Dreame L40 Ultra Gen 2 vs Roborock QV 35S
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the Dreame L40 Ultra Gen 2 costs $750 and the Roborock QV 35S costs $550, so the Roborock QV 35S is $200 cheaper. Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Roborock QV 35S for mostly hard floor homes on a mid budget. The Dreame L40 Ultra Gen 2 wins 4 of 8 points we can measure (2 tied).
Who wins, point by point
The Dreame L40 Ultra Gen 2 wins 4 of 8 points we can measure (2 tied). Built from today's prices, the specs and independent tests for these two robots.
| L40 Ultra Gen 2 | QV 35S | Winner | |
|---|---|---|---|
| Price today | $750 | $550 | QV 35S |
| 3 year cost | $790 | $652 | QV 35S |
| Warranty | 3 years | 1 year | L40 Ultra Gen 2 |
| Suction | 25,000 Pa | 10,000 Pa | L40 Ultra Gen 2 |
| Runtime per charge | 231 min | 3 h | L40 Ultra Gen 2 |
| Climbs thresholds up to | 0.79 in | 0.8 in | Tie |
| Robot height (fits under furniture) | 3.82 in | 3.8 in | Tie |
| Release year | 2026 | 2025 | L40 Ultra Gen 2 |
- You care most about warranty (3 years vs 1 year)
- You care most about suction (25,000 Pa vs 10,000 Pa)
- You care most about runtime per charge (231 min vs 3 h)
- Best for tidy hard floor homes that want strong mopping
- You want to spend less (saves $200)
- Best for mostly hard floor homes on a mid budget
- Suction
- 25,000 Pa claimed
- Navigation
- LDS LiDAR
- Mopping
- Dual spinning mops
- Runtime
- Up to 231 min in quiet
Strong mopping all in one dock bot, but poor obstacle avoidance
Full Dreame L40 Ultra Gen 2 review, pros and cons →- Suction
- 10,000 Pa
- Navigation
- PreciSense LiDAR
- Mopping
- Dual spinning mops
- Runtime
- Up to 180 min
Affordable full dock robot that shines on hard floors
Full Roborock QV 35S review, pros and cons →Side by side
| Dreame L40 Ultra Gen 2 | Roborock QV 35S | |
|---|---|---|
| Price | $750 | $550 |
| 3 year cost | $790 | $652 |
| Our score | Not scored yet | Not scored yet |
| Rank in Floors | #70 | #67 |
| Status | on sale | on sale |
| Warranty | 3 years (Dreame US store) | 1 year limited (Roborock 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 | 10,000 Pa (Roborock) |
| Navigation | LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than its 0.72 average | PreciSense LiDAR (Roborock); Ideal Home saw about 5 min mapping per floor |
| 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% | Reactive Tech structured light (Roborock); Ideal Home saw it bump a dumbbell once, then avoid it; Tom's Guide rated avoidance strong |
| 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 at up to 200 RPM with auto lift (Roborock); Tom's Guide found it handled mud and daily spills but left some oily residue |
| Self empty | Yes, 3.2 L dust bag, up to 100 days (Dreame) | Yes, 2 L bag, up to 7 weeks per Roborock (Ideal Home) |
| 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, auto refill, mop washing, cold air drying, detachable base (Roborock) |
| 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 180 min (Tom's Guide, Ideal Home); Ideal Home had about 40% battery left after a whole house clean |
| Dustbin | 250 ml robot bin plus 3.2 L dock bag (Dreame) | n/a |
| Height | 3.82 in (97 mm) (Dreame) | 3.80 in (Roborock) |
| 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% | Tom's Guide measured 92% hair pickup on hardwood, 60% on low pile carpet and 40% on high pile carpet |
| App | Dreamehome app with Alexa, Siri, Google Home and Apple Watch; Matter planned in an update (Dreame) | Roborock app; 2.4 GHz Wi-Fi only (Roborock); Ideal Home found the app buggy at times |
| Threshold | 0.79 in (2 cm) (Dreame) | Up to 2 cm (Roborock) |
| Noise | Vacuum Chef measured 73 dB at max suction, about average | 64 dB Balanced and 55 dB mop only (Roborock); Tom's Guide heard about 60 dB vacuuming and 55 dB mopping |
| Best for | tidy hard floor homes that want strong mopping | mostly hard floor homes on a mid budget |
| Skip if | you have pets with long hair or a cluttered floor | you have high pile carpet or heavy shedding pets |
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
Roborock QV 35S
- Tom's Guide: On hardwood it picked up 92% hair, 94.5% puffed rice and 98% flax seeds. On high pile carpet it got 40% hair and 38.5% flax seeds. About 55 dB mopping and 60 dB vacuuming. Called it ideal for hardwood homes. Source
- Ideal Home: Handled rice, flour, ketchup and dog hair on hard floors, mapped each floor in about 5 min, and had about 40% battery left after the whole house. Weaker on carpet and dog hair in rugs, and the app was buggy at times. Source
Questions buyers ask
Which is better, the Dreame L40 Ultra Gen 2 or the Roborock QV 35S?
Pick the Dreame L40 Ultra Gen 2 for tidy hard floor homes that want strong mopping. Pick the Roborock QV 35S for mostly hard floor homes on a mid budget.
Which is cheaper?
The Roborock QV 35S at $550, versus $750 for the Dreame L40 Ultra Gen 2, checked Nov 4, 2026. Over 3 years with running costs: $790 vs $652.
What is the difference between the L40 Ultra Gen 2 and the QV 35S?
Suction: 25,000 Pa claimed (Dreame); Vacuum Wars measured 0.79 kPa bench suction against a 0.99… on the L40 Ultra Gen 2, 10,000 Pa (Roborock) on the QV 35S. Navigation: LDS LiDAR, up to 4 maps (Dreame); Vacuum Wars measured 0.84 m2 per minute, faster than… on the L40 Ultra Gen 2, PreciSense LiDAR (Roborock); Ideal Home saw about 5 min mapping per floor on the QV 35S. Obstacle avoidance: 3D structured light only; the RGB camera of the original L40 Ultra was removed (Dreame… on the L40 Ultra Gen 2, Reactive Tech structured light (Roborock); Ideal Home saw it bump a dumbbell once, then… on the QV 35S.
Also consider at this price
See all ranked →More comparisons
- Dreame L40 Ultra Gen 2 vs Dreame L50 Ultra
- Dreame L40 Ultra Gen 2 vs Roborock Qrevo S5V
- Dreame L40 Ultra Gen 2 vs Dreame X50 Ultra
- Dreame L40 Ultra Gen 2 vs Roborock Qrevo S Pro
- Dreame L40 Ultra Gen 2 vs Dreame L40s Ultra
- Dreame L40 Ultra Gen 2 vs Dreame L40s Ultra AE
- Dreame L40 Ultra Gen 2 vs Dreame L40s Ultra CE
- Dreame L40 Ultra Gen 2 vs eufy Omni E25
All robot vacuums, ranked
See the ranking →Affiliate links. We may earn a commission. It never changes our score. Disclosure
We check prices every morning and compare them with each model's 2026 low. One email when real deals land, plus our 5 minute Friday roundup. Unsubscribe anytime.