Dreame L40 Ultra Gen 2 vs Dreame L40s Ultra
Researched by Riley Hart · prices checked Oct 31, 2026
As of Oct 31, 2026, the Dreame L40 Ultra Gen 2 costs $570 and the Dreame L40s Ultra costs $570. The Dreame L40s Ultra has a published review score and ranks #9 in our robot vacuums ranking; the Dreame L40 Ultra Gen 2 is not scored yet. Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Dreame L40s Ultra for pet owners with carpet on a budget.
- Suction
- 25,000 Pa claimed
- Navigation
- LDS LiDAR
- Mopping
- Dual spinning mops
- Runtime
- Up to 231 min in quiet
A capable mopper with a full dock for about $500 to $570, but a step back from the original L40 Ultra in obstacle avoidance. Vacuum Wars saw it avoid only 2 of 24 objects and wrap 67% of long hair. Pick it only for tidy homes without long hair; Vacuum Wars itself points pet owners to the L40s Ultra.
Full Dreame L40 Ultra Gen 2 review →- Suction
- 19,000 Pa claimed
- Navigation
- LDS LiDAR
- Mopping
- Dual spinning mops
- Runtime
- Up to 220 min in quiet
The best carpet and pet hair performer of the L40s range, with a hot water mop dock, now far below its $1,399.99 launch price. Vacuum Wars measured 92% sand removal and 91% pet hair pickup with no tangles. Skip it if your floors are cluttered, since it avoided only 7 of 24 objects.
Full Dreame L40s Ultra review →Side by side
| Dreame L40 Ultra Gen 2 | Dreame L40s Ultra | |
|---|---|---|
| Price | $570 | $570 |
| 3 year cost | $610 | $570 |
| Our score | Not scored yet | 8.6/10 |
| Rank in Floors | #58 | #9 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 3 years (Dreame US store) |
| Suction | 25,000 Pa claimed (Dreame); Vacuum Wars measured 0.79 kPa bench suction against a 0.99 kPa average, and Vacuum Chef measured 11.5 CFM airflow against a 9.0 average | 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above average |
| Navigation | LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than its 0.72 average | LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute |
| Obstacle avoidance | 3D structured light only; the RGB camera of the original L40 Ultra was removed (Dreame, Vacuum Wars); Vacuum Wars saw it avoid 2 of 24 objects and Vacuum Chef scored 30% | 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7 of 24 objects |
| Mopping | Dual spinning mops, 10.5 mm lift, 4 cm extension, no auto removal (Dreame); Vacuum Wars scored dried stains 144 against a 108 average | Dual spinning mops, 10.5 mm lift, extend and auto removal (Dreame); Vacuum Wars measured 0.95 g water left and a 259 combined mop score |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, 3.2 L dust bag, up to 100 days (Dreame) |
| Dock features | Auto empty, mop wash, hot air drying, auto water refill, 4.5 L clean and 4.0 L dirty tanks; detergent dispenser sold separately for $39.99 (Dreame). Dreame lists hot water mop cleaning, but Vacuum Wars says Gen 2 washes with room temperature water | Auto empty, 167 F (75 C) hot water mop wash, hot air drying, self cleaning washboard, auto detergent and water refill, 4.5 L clean and 4.0 L dirty tanks; water hookup kit sold separately (Dreame) |
| Runtime | Up to 231 min in quiet vacuum mode, up to 1,679 sq ft (Dreame); Vacuum Wars estimated about 1,290 sq ft per charge | Up to 220 min in quiet mode from 5,200 mAh (Dreame); Vacuum Wars estimated about 1,935 sq ft per charge |
| Dustbin | 250 ml robot bin plus 3.2 L dock bag (Dreame) | 310 ml robot bin plus 3.2 L dock bag (Dreame) |
| Height | 3.82 in (97 mm) (Dreame) | 3.82 in (Dreame) |
| Pet hair | Vacuum Wars measured 69% flattened pet hair pickup and 67% hair wrap on its 7 in hair test; carpet sand removal was 90% | HyperStream Detangling DuoBrush (Dreame); Vacuum Wars measured 91% pet hair pickup, 92% carpet sand removal and 0% hair wrap |
| App | Dreamehome app with Alexa, Siri, Google Home and Apple Watch; Matter planned in an update (Dreame) | Dreamehome app with third party voice assistants only (Dreame); Vacuum Chef notes no built in voice assistant or live video |
| Threshold | 0.79 in (2 cm) (Dreame) | 1.57 in double layer and 0.87 in single steps (Dreame) |
| Noise | Vacuum Chef measured 73 dB at max suction, about average | Vacuum Chef measured 78 dB at max suction |
| Best for | tidy hard floor homes that want strong mopping | pet owners with carpet on a budget |
| Skip if | you have pets with long hair or a cluttered floor | your floor often has cables, socks or toys |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Dreame L40 Ultra Gen 2
- Vacuum Wars (3.11 Vacuum Wars stars): Dried stain score 144 (108 average), 90% carpet sand removal, but 69% pet hair pickup, 67% hair wrap and only 2 of 24 obstacles avoided. Estimated about 1,290 sq ft per charge. Source
- Vacuum Chef: Measured 11.5 CFM airflow, 90% coffee, 60% sand and 98% cat litter pickup, 73 dB at max and a 30% obstacle avoidance score against a 66% average. Called it a rebalancing rather than an upgrade. Source
Dreame L40s Ultra
- Vacuum Wars (3.51 Vacuum Wars stars): 92% carpet sand removal, 91% pet hair pickup and 0% hair wrap with the DuoBrush, about 1,935 sq ft per charge, but only 7 of 24 obstacles avoided. Source
- Vacuum Chef (95/100): Scored 95/100 in its real world cleaning tests, measured 490 FPM carpet airflow and 78 dB at max suction. Obstacle avoidance varied by floor and object. Source
Pros and cons
Dreame L40 Ultra Gen 2
Pros
- Strong stain removal in Vacuum Wars testing
- 90% carpet sand removal
- Efficient, fast navigation
- Long claimed runtime
- Extending mop and side brush
Cons
- Avoided only 2 of 24 obstacles
- 67% long hair wrap
- Weak pet hair pickup
- Detergent dispenser costs extra
- No camera or auto mop removal
Dreame L40s Ultra
Pros
- 92% carpet sand removal in Vacuum Wars testing
- 91% pet hair pickup, no tangles
- Extending side brush and mop
- Mop pads detach before carpet
- Deep discount from launch price
Cons
- Avoided only 7 of 24 obstacles
- No camera
- Loud at max, 78 dB in Vacuum Chef testing
- No built in voice assistant
- Bulky base station
Questions buyers ask
Which is better, the Dreame L40 Ultra Gen 2 or the Dreame L40s Ultra?
The Dreame L40s Ultra has a published review score and ranks #9 in our robot vacuums ranking; the Dreame L40 Ultra Gen 2 is not scored yet. Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Dreame L40s Ultra for pet owners with carpet on a budget.
What is the difference between the L40 Ultra Gen 2 and the L40s Ultra?
Suction: 25,000 Pa claimed (Dreame); Vacuum Wars measured 0.79 kPa bench suction against a 0.99… on the L40 Ultra Gen 2, 19,000 Pa claimed (Dreame); Vacuum Chef measured 490 FPM carpet airflow, well above… on the L40s Ultra. Navigation: LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than… on the L40 Ultra Gen 2, LDS LiDAR with Pathfinder, 4 maps (Dreame); Vacuum Wars measured 0.85 m2 per minute on the L40s Ultra. Obstacle avoidance: 3D structured light only; the RGB camera of the original L40 Ultra was removed (Dreame… on the L40 Ultra Gen 2, 3D structured light only, no camera or object count (Dreame); Vacuum Wars saw it avoid 7… on the L40s Ultra.
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