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Choosing between the Dreame L40 Ultra, L40s Ultra, and X40 Ultra can be really tricky – they’re all advanced robot vacuums with mopping, self-cleaning docks, and smart navigation. In this comparison, we’ll break down what makes each model unique and help you decide which is the best robot vacuum for your needs. Whether you want ultra-strong suction for pet hair, intelligent obstacle avoidance for a cluttered home, or a budget-friendly one, we’ve got you covered. Let’s dive into the Dreame L40 vs L40s vs X40 showdown and find your perfect match!
Overview of Key Features
Before we zoom in on details, here’s a quick at-a-glance comparison of the three models:
| Feature | L40 Ultra | L40s Ultra | X40 Ultra |
| Suction Power | 11,000 Pa | 19,000 Pa | 12,000 Pa |
| Main Brush | Single TriCut™ (anti-tangle) | Dual HyperStream™ DuoBrush (no tangles) | Single brush (TriCut add-on) |
| Mopping | Dual mops, 65 °C hot wash | Dual mops, 75 °C hot wash | Dual mops, 70 °C hot wash |
| Base Station | 7-in-1, up to 75 days hands-free | 7-in-1 + AceClean™ DryBoard, up to 100 days | 7-in-1, up to 75 days |
| Battery | 5,200 mAh (~2h) | 5,200 mAh (fast charge) | 6,400 mAh (~2.5–3h) |
| Obstacle Avoidance | RGB cam + 3D structured light (~100 objects) | 3D structured light only | RGB cam + 3D structured light (~120 objects) |
| Best For | Value seekers, AI smarts | Homes w/ pets, max suction | Large homes, advanced AI, longer coverage |
Each model is a robot vacuum and mop with a self-cleaning dock, but they differ in suction power, brush design, and smart features.
Suction Power and Cleaning Performance
The Dreame L40s Ultra is the suction powerhouse, hitting 19,000 Pa—almost double the L40 Ultra. That extra strength shines if you’re dealing with kibble, litter, or fine dust daily.
By comparison, the X40 Ultra offers 12,000 Pa, strong enough for deep carpet cleaning. The L40 Ultra sits at 11,000 Pa, still above industry averages and perfect for everyday use.
| Model | Suction Power | Best For |
| L40s Ultra | 19,000 Pa | Heavy debris, fine dust, litter |
| X40 Ultra | 12,000 Pa | Deep carpets & rugs |
| L40 Ultra | 11,000 Pa | Daily hardwood & carpet cleaning |
Brush Systems: Tackling Pet Hair & Dirt
The L40s Ultra uses the HyperStream™ Detangling DuoBrush—two counter-rotating rollers (bristle + rubber) that handle even 30 cm long hair without tangling. This makes it a pet owner’s dream.
The L40 Ultra and X40 Ultra both rely on the TriCut™ Anti-Tangle brush. It works well for everyday debris and most pet hair, though very long strands may occasionally snag.
| Model | Brush Type | Pet Hair Handling |
| L40s Ultra | HyperStream™ DuoBrush (dual rollers) | Tangle-free, best for heavy shedders |
| L40 Ultra | TriCut™ Single Brush | Good, may snag on long hair |
| X40 Ultra | TriCut™ (included accessory) | Same as L40 Ultra |
Floor Cleaning & Surface Reach
All three models mop and vacuum simultaneously with strong dual spinning mops + the SideReach™ extendable side brush for edges.
- L40s Ultra adds MopExtend™ RoboSwing for deeper corner and baseboard scrubbing.
- L40 Ultra & X40 Ultra feature Triple-Up tech, lifting both brush + mops to keep carpets dry.
- The L40s Ultra lifts its mops 10.5 mm, keeping the brush down—better for carpet cleaning, but a slight trade-off on wet protection.
| Model | Mopping Tech | Edge Cleaning | Carpet Protection | Notable Advantage |
| L40 Ultra | Dual spinning mops | SideReach™ | Triple-Up (lifts main brush + mops) | Great for carpet-heavy homes |
| L40s Ultra | Dual spinning mops + MopExtend™ RoboSwing | SideReach™ | Lifts mops ~10.5 mm (no main brush lift) | Best edge reach on hard floors |
| X40 Ultra | Dual spinning mops | SideReach™ | Triple-Up (lifts main brush + mops) | Balanced for mixed surfaces |
Pro-tip If pet hair is your top worry, go with the L40s Ultra. Its dual-brush system resists tangles and captures fur effectively. Learn more in our blog on HyperStream DuoBrush—the same tech behind the L40s Ultra.
Navigation and Obstacle Avoidance
L40 Ultra & X40 Ultra: AI Camera + 3D Sensors
Both models use a front-facing RGB camera combined with 3D structured light and LED illumination.
- Object recognition: L40 Ultra spots up to 100 types, while the X40 Ultra pushes that to 120 types with extra AI processing power.
- Real benefit: they avoid small hazards like cables, shoes, socks, pet toys, and even pet accidents.
- Bonus: the camera doubles as a remote video viewer through the app — you can check in on your home or pets anytime.
L40s Ultra: Laser-Only Approach
Instead of a camera, the L40s Ultra uses a Single-Laser 3D obstacle avoidance system.
- It projects an infrared laser to size up obstacles in 3D, so it still avoids random clutter like shoes or toys.
- Since there’s no image recognition, it doesn’t label objects (e.g., won’t distinguish a pet accident from a toy).
- Advantage: works in complete darkness and is more privacy-friendly (no onboard camera).
- Maps up to 4 separate floors — great for multi-level homes.
Shared Navigation Strengths
All three Dreame models are equipped with LiDAR mapping, ensuring highly accurate floor maps and efficient path planning.
- You can set no-go zones and room-specific cleaning in the app.
- Each model handles thresholds and transitions, but with differences:
- L40 Ultra & X40 Ultra: climb up to ~20 mm (standard door frames).
- L40s Ultra: climbs up to 40 mm, handy for double-layer steps.
| Feature | L40 Ultra | X40 Ultra | L40s Ultra |
| Obstacle Avoidance | RGB camera + 3D structured light + LED | RGB camera + 3D structured light + LED | Single-Laser 3D |
| Object Recognition | ~100 types | ~120 types | No (detects shapes only) |
| Works in Darkness | Yes (LED assist) | Yes (LED assist) | Yes (laser only) |
| Remote Video Viewing | ✅ | ✅ | ❌ |
| Multi-Floor Mapping | ✅ (up to 4) | ✅ (up to 4) | ✅ (up to 4) |
| Threshold Climbing | ~20 mm | ~20 mm | Up to 40 mm |
| Camera | ✅ | ✅ | ❌ |
Mopping and Self-Cleaning Dock
One of Dreame’s signature features is the all-in-one base station, and all three robots come with one – meaning they empty their own dust, wash and dry their mopping pads, and refill water for mopping. This is a game-changer for multi-surface floor cleaning, essentially giving you truly hands-free cleaning for weeks at a time. The differences here are subtle but worth noting:
- Auto-Empty Dustbin: Each model automatically empties its dustbin into a bag in the dock. The L40 Ultra and X40 Ultra both have a 0.8gal dust bag, enough for up to 75 days of debris before you toss the bag. The L40s Ultra’s dock was slightly improved to hold up to 100 days of dust in its bag. In reality, actual intervals vary with usage, but expect to empty these bags every 2–3 months on average – a far cry from emptying a normal robot’s bin daily!
- Mop Washing and Drying: All three base stations will wash the mop pads automatically after the robot has mopped for a while or finished a job. They scrub the pads against a washboard and even clean that washboard itself, so grime isn’t left sitting. The big difference is water temperature: the L40 Ultra uses hot water up to 65 °C (149 °F) to wash the mops, which was already effective. The X40 Ultra boosts this to 70 °C (158 °F), and the L40s Ultra goes even further – up to 75 °C (167 °F) for mop washing. All of them do well with normal spills, but the L40s Ultra’s hotter wash might remove tough stains from the pads slightly more thoroughly. It’s dock includes an AceClean™ DryBoard, which is a drying plate that reduces water residue.
- Water Tanks: The base stations have clean water and waste water tanks for the mopping function. Despite the L40 Ultra being the “value” model, it shares the same generous tank sizes as the others – roughly 1.19 gal clean / 1.06 gal dirty capacity. In a large home, the X40 Ultra especially benefits from this. The base’s large tanks ensure it has enough water to keep mopping without frequent user intervention. All docks also support an optional water hookup kit for automatic refilling and draining (if you want to plumb it in, sold separately), but that’s optional.
| Feature | L40 Ultra | X40 Ultra | L40s Ultra |
| Auto-Empty Dustbin | 0.8 gal / 3.2 L (≈75 days) | 0.8 gal / 3.2 L (≈75 days) | Slightly larger, up to 100 days |
| Mop Washing Water Temp | Up to 65 °C / 149 °F | Up to 70 °C / 158 °F | Up to 75 °C / 167 °F |
| Mop Drying | Hot air, standard | Hot air, standard | Hot air + AceClean™ DryBoard |
| Clean Water Tank | 1.19 gal / 4.5 L | 1.19 gal / 4.5 L | 1.19 gal / 4.5 L |
| Dirty Water Tank | 1.06 gal / 4 L | 1.06 gal / 4 L | 1.06 gal / 4 L |
| Optional Water Hookup Kit | Yes (sold separately) | Yes (sold separately) | Yes (sold separately) |
Overall, hands-free maintenance is a strong suit for all three. You’ll mainly just replace the dust bag every couple of months and refill the clean water tank now and then. Dreame calls these “7-in-1” or “All-in-One” Omni stations because they handle dust, mops, water, drying, etc., and it truly takes the daily chore out of your hands.
Important Remember to occasionally check the dock – toss out the dirty water and give the mop wash tray a quick rinse each week or so for optimal hygiene. A little TLC will ensure your robot keeps running with minimal effort.
Battery Life and Coverage
If you have a large home, battery life is key. The X40 Ultra has a 6,400 mAh battery, giving ~2.5–3 hours runtime—enough to cover bigger areas in one go. The L40 Ultra and L40s Ultra use 5,200 mAh batteries (~2 hours), suitable for most apartments or medium homes (150–200 m² / 1,600–2,150 ft²). All models auto-recharge and resume mid-task.
Charging is 30% faster than previous generations, with full recharge in a few hours. X40 Ultra may finish a large area in one pass, while L40/L40s might need one recharge. Each supports 3–4 floor maps, so multi-level homes are easily managed.
For smaller homes, all models have ample battery, and eco/quiet modes extend runtime. For very large homes (2,500+ ft²), X40 Ultra’s bigger battery offers faster, more efficient cleaning.
| Feature | L40 Ultra | X40 Ultra | L40s Ultra |
| Battery Capacity | 5,200 mAh | 6,400 mAh | 5,200 mAh |
| Runtime (standard mode) | ~2 hours | ~2.5–3 hours | ~2 hours |
| Charging Speed | 30% faster than previous gen | 30% faster | 30% faster |
Smart Features and App Experience
Dreame’s app (Dreamehome) provides a robust set of smart features for all these models including real-time mapping, setting no-go zones, cleaning schedules, and customization of suction and mop intensity per room. Voice control is supported on all three as well.
There are unique smart features to call out:
- CleanGenius™ AI (Automatic Cleaning Optimization): Available on L40 Ultra and X40 Ultra. The robot uses sensors to adjust cleaning automatically—slowing down, scrubbing more, or making extra passes in dirty areas. L40 Ultra detects heavily soiled spots (“OmniDirt”) and suggests cleaning modes by room type. X40 Ultra adds an RGB camera and turbidity sensor to monitor mop water, rinse if needed, and re-clean tough stains. The L40s Ultra lacks the camera, more manual.
- Remote Video & Monitoring: The L40 Ultra and X40 Ultra’s cameras allow for a remote view. Through the app, you can drive the robot around like an R/C car and see through its camera. The L40s Ultra doesn’t offer this since it has no camera.
- Mapping and Multi-Floor: All three support multi-level mapping (3–4 floors). LiDAR allows fast initial mapping—usually a floor in minutes using “quick mapping.” Once mapped, you can label rooms, set schedules per room, and store maps internally.
- Software Updates: Dreame provides OTA (over-the-air) updates for firmware. Historically, they’ve added features or fine-tuned things via updates. Since L40 and X40 Ultra have AI, they might get smarter with updates too (e.g. recognizing more object types). L40s Ultra’s laser system is more static, but it may get general navigation optimizations over time.
The app works for all models, so major functions are consistent. The L40s Ultra lacks camera features (no video feed or auto photo capture), while the other two include them. If you prefer privacy, L40s Ultra is fully sensor-based and camera-free.
Price and Value Considerations
- L40 Ultra: Most affordable, the “spotless value” option. Includes auto-empty, mop washing, decent suction, and AI avoidance—great for most households wanting hands-free cleaning without a high price.
- L40s Ultra: Priciest, with stronger suction, dual brush system, and slightly upgraded base. Ideal if you need maximum cleaning power (high-pile carpets, pet hair) or want the latest tech.
- X40 Ultra: Mid-range, balancing features and price. Larger battery, advanced AI and camera functions, and strong suction. Often bundled with the TriCut brush, making it a flagship option for larger homes or tech enthusiasts.
Pro-tip Consider your home’s needs—pets, smart home features, and floor type will guide which model offers the best value.
Which One Should You Buy?
To wrap up:
- The best value for your money: L40 Ultra offers a near hands-free cleaning experience for weeks at a time. Strong vacuum and mop combo, TriCut brush handles pet hair well, and camera-based obstacle avoidance keeps it efficient. Ideal for small to mid-sized homes or first-time buyers wanting high-end performance without overspending.
- The powerhouse pick: L40s Ultra, with 19,000 Pa suction and a duo-brush system, excels at pulling up debris from carpets and floors, even in homes with multiple shedding pets. Gives up camera features in favor of pure cleaning muscle. Best for carpet-heavy homes or users who want maximum pickup power, regardless of price.
- The large-home and smart-tech choice: X40 Ultra. Bigger battery cleans more area per run. Advanced obstacle avoidance and a remote monitoring camera appeal to tech lovers. Cleaning performance is nearly on par with the L40s, except in extreme dirt scenarios. A balanced flagship for those who want strong suction, smart features, and long runtime.
| Model | Key Strengths | Brush Type | Best For | Price Tier |
| L40 Ultra | Value + convenience, strong vac+mop, pet-hair capable | TriCut brush | Small–mid homes, budget-conscious | $$ |
| L40s Ultra | Max cleaning for pets & carpets | Duo-brush | Multi-pet, carpet-heavy homes | $$$ |
| X40 Ultra | Large-home coverage + smart AI | Duo-brush | Large homes, tech enthusiasts | $$$ |
Happy cleaning, and here’s to a smarter, cleaner home with less effort! 🎉
Dreame Take No matter which model you choose – L40 Ultra, L40s Ultra, or X40 Ultra – you’ll be gaining a helping hand that takes care of daily floor cleaning so you can spend more time enjoying your home instead of cleaning it. Each robot in this lineup embodies Dreame’s goal of making cleaning effortless, so rest assured you’ll be in good hands.
Ready to make the leap?
You can check out the Dreame robot vacuum collection for all models, or see the specific product pages here: Dreame L40 Ultra, Dreame L40s Ultra (robot vacuum with DuoBrush), and Dreame X40 Ultra. Each page has more details and the latest pricing. Here’s to finding the perfect robot vacuum for your home!