Head to head · Updated Sep 27, 2026
Dreame L40 Ultra Gen 2 vs Roborock Qrevo S Pro
The two all-in-one docks most shoppers compare at around $500. Both empty themselves, wash and dry their spinning mops and avoid obstacles with structured light. The Dreame adds extending brush and mop for corners and a longer warranty; the Roborock refills its own water.
Dreame
Dreame L40 Ultra Gen 2
- Suction
- 25,000 Pa
- Runtime
- 231 min
- Height
- 3.82 in
- Dock
- All-in-one
Roborock
Roborock Qrevo S Pro
- Suction
- 18,500 Pa
- Runtime
- 180 min
- Height
- 3.8 in
- Dock
- All-in-one
Quick verdict
Which one should you buy?
The L40 Ultra Gen 2 is the better robot for most homes; the Qrevo S Pro wins if automatic water refill matters to you.
Choose the Dreame L40 Ultra Gen 2 if…
You want better corner and edge cleaning (the side brush and mop swing out), more suction (25,000 vs 18,500 Pa), a longer runtime (231 vs 180 min) and a 3-year warranty with Amazon as the seller.
Check priceChoose the Roborock Qrevo S Pro if…
You want a dock that also refills the robot's water, washes mops with 167°F water, and the huge sales and review base of Amazon's best-selling all-in-one robot.
Check priceEditor scores
How they stack up
- Dreame L40 Ultra Gen 2
- Roborock Qrevo S Pro
Key differences
By the numbers
- Dreame L40 Ultra Gen 2 has more claimed suction: 25,000 Pa vs 18,500 Pa
- Dreame L40 Ultra Gen 2 runs longer per charge: 231 min vs 180 min
- Roborock Qrevo S Pro is slimmer (fits under lower furniture): 3.8 in vs 3.82 in
- Dreame L40 Ultra Gen 2 is rated higher on Amazon: 4.3★ (612 ratings) vs 4.1★ (6,413)
Full specs
Spec by spec
| Spec | Dreame L40 Ultra Gen 2 | Roborock Qrevo S Pro |
|---|---|---|
| Cleaning | ||
| Max suction (claimed) | 25,000 Pa | 18,500 Pa |
| Mop system | Dual spinning pads (extendable) | Dual spinning pads (liftable) |
| Mop lift | 10.5 mm | — |
| Extending brush/mop for edges | Yes | — |
| Anti-tangle brushes | — | Yes |
| Navigation & fit | ||
| Navigation | LiDAR (Smart Pathfinder) | LiDAR (multi-floor maps) |
| Obstacle avoidance | 3D structured light (3DAdapt) | Structured light (Reactive Tech) |
| Robot height | 3.82 in | 3.8 in |
| Threshold climbing | 0.79 in | — |
| Battery | ||
| Max runtime (claimed) | 231 min | 180 min |
| Battery | 5,200 mAh | 5,200 mAh |
| Dock & maintenance | ||
| Self-emptying | Yes | Yes |
| Dust bag capacity | — | 49 days |
| Washes the mop | Yes | Yes |
| Mop wash water | — | 167 °F |
| Hot-air mop drying | Yes | Yes |
| Refills its own water | No | Yes |
| Other | ||
| Noise (claimed) | — | 60 dB |
| Voice assistants | Alexa, Siri, Google Home | Alexa, Siri, Google Home |
| Warranty | 3 years | 1 year |
| Editor scores (0–10) | ||
| Suction | 9 | 8 |
| Navigation | 7 | 7 |
| Mopping | 8 | 8 |
| Hands-free | 8 | 9 |
| Low profile | 3 | 4 |
| Pet hair | 7 | 8 |
| Value | 9 | 8 |
| Overall editor score | 7.9 | 7.7 |
“Best” marks the stronger value in each row. A dash means the value isn’t published. Dreame L40 Ultra Gen 2 wins 2 spec rows, Roborock Qrevo S Pro wins 2. Scores follow our rating rules.
Pros & cons
What owners and specs say
Dreame L40 Ultra Gen 2
- Extending side brush and mop for corners
- 25,000 Pa with carpet modes
- 231-minute runtime
- 3-year warranty, sold by Amazon
- Detergent dispenser costs extra
- 2.4 GHz Wi-Fi only
- One long-term owner wants more battery
Roborock Qrevo S Pro
- Full dock: empty, refill, 167°F wash, warm-air dry
- Zero-tangle brushes for pets
- Structured-light obstacle avoidance
- Huge sales and review base
- Some owners report firmware glitches
- 1-year warranty
- Sold by a third-party seller
Frequently asked questions
Which cleans corners better?
The Dreame L40 Ultra Gen 2: both its side brush and one mop extend outward to reach corners and under cabinet edges.
Which has the better warranty?
Dreame lists 3 years; Roborock lists 1 year for the Qrevo S Pro.
Which is easier to live with?
Both are close. The Qrevo S Pro refills its own water; the L40 has an optional auto-detergent module.
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