Dreame L20 Ultra vs Roborock QV 35A
Quick take: The Roborock QV 35A costs $20 less; the Roborock QV 35A has stronger suction (8,000 vs 7,000 Pa); the Dreame L20 Ultra runs longer per charge (210 vs 180 min).
Which one to buy
Both have sold for about $400 (the QV 35A is now $380), though the L20 Ultra is now discontinued and Dreame's replacement is the L40 Ultra Gen 2 at $570. Otherwise the choice is a better-equipped Dreame or an easier-to-own Roborock. Both come with a full dock that empties, washes and lifts mops, LiDAR mapping, dual spinning mops and a 1-year warranty.
The L20 Ultra has more hardware for the money. Its dock washes pads with hot water, where the QV 35A uses cold water and room-temperature air, and QV 35A owners say greasy pads need an occasional hand rinse and the dock can smell if neglected. The Dreame's mops extend out to reach baseboards, which owners say ends the dirty strip along walls. It lifts its mops 10.5mm against 10mm, and it adds a camera; owners say it handles toys and cables in cluttered rooms, while the QV 35A relies on sensor-based avoidance that can still catch cables and socks. Runtime is 210 minutes against 180.
The Roborock wins on living with it. Owners describe some of the most lopsidedly positive sentiment at this price, six-month owners who touch it only to swap the bag, and cheap, widely available third-party parts. It has slightly more suction, 8000 Pa against 7000 Pa, though neither is a deep-carpet machine by owner accounts. Its complaints are noise from both robot and dock, hair collecting at the brush end caps, and a few early dock-flooding cases traced to badly seated tanks.
The L20 Ultra's owners report slow US support from Dreame, tanks that need refilling every two to three cleans, and streaks on dark hardwood when pads get dirty.
Dreame L20 Ultra
Now discontinued, so only as leftover stock; makes sense if hot-water pad washing, edge mopping and camera-assisted obstacle handling matter to you, especially in a busy kitchen or a home with floor clutter.
Roborock QV 35A
Worth it if you want the brand with cheaper parts and a strong owner track record, your floors are kept reasonably clear, and cold-water mop washing is acceptable.
| Spec | Dreame L20 Ultra | Roborock QV 35A |
|---|---|---|
| Price | ~$400 | ~$380 |
| Type | Robot Vacuum & Mop | Robot Vacuum & Mop |
| Suction | 7000 Pa | 8000 Pa |
| Battery | 210 min | 180 min |
| Navigation | LiDAR + Camera | LiDAR |
| Filtration | — | Washable filter |
| Cordless | Yes | Yes |
| Bagged | — | — |
| Noise | 63 dB | — |
| Dustbin | 350 ml | 330 ml |
| Water tank | 80 ml | — |
| Self-empty dock | Yes | Yes |
| Auto mop washing | Yes | Yes |
| Hot water washing | Yes | No |
| Obstacle avoidance | Yes | Yes |
| Carpet detection | Yes | Yes |
| Auto mop lifting | Yes | Yes |
| Multi-floor mapping | Yes | Yes |
| App control | Yes | Yes |
| Dimensions | 13.9 x 13.9 x 4.0 in | 13.78 x 13.9 x 3.80 in |
| Weight | 9.5 lbs | — |
| Warranty | 3 years | 1 year |
Pros & cons
Dreame L20 Ultra
- ✓MopExtend feature cleans right up to baseboards where most robots leave a strip
- ✓Hot water mop washing at the dock keeps pads sanitary
- ✓Excellent obstacle avoidance — handles cluttered rooms with toys and cables
- ✓Long 210-minute battery handles large homes in one session
- ✓Mop lifts 10.5mm, one of the highest in the market
- ✗Suction power at 7000Pa is mid-range for the price
- ✗Dock is bulky and the water tanks need refilling every few cleans
- ✗Sometimes leaves streaks on very dark hardwood floors
- ✗App notifications can be overly chatty and annoying
Roborock QV 35A
- ✓Complete self-maintaining dock (empty, wash, refill, dry) at a budget price
- ✓Excellent hard-floor pickup from fine dust to large debris
- ✓Reliable LiDAR mapping and the mature Roborock app with multi-floor maps
- ✓Anti-tangle brushes genuinely resist pet-hair wrap
- ✓Dual spinning mops scrub better than flat-pad budget rivals
- ✓180-minute runtime covers large homes in one charge
- ✗Cold-water mop washing and cool-air drying — mops can sour if neglected
- ✗Sensor-based obstacle avoidance still eats cables and socks occasionally
- ✗8,000 Pa is mid-tier for deep carpet cleaning
- ✗10 mm mop lift is too little for medium/plush carpet
- ✗Only a 1-year warranty
Dreame L20 Ultra vs Roborock QV 35A: common questions
At about $400, does the Dreame L20 Ultra mop better than the Roborock QV 35A?▾
It has the edge for greasy floors and edges. The L20 Ultra washes pads with hot water and extends its mop to the baseboards. QV 35A owners still say its 200 RPM spinning mops lift sticky spots well, but its cold-water wash needs an occasional hand rinse.
Which one is quieter?▾
Noise is the most common QV 35A complaint: owners say the robot on high suction and the dock's auto-empty are loud enough to schedule runs while they're out. The L20 Ultra is rated at 66 dB, and its owners don't single out noise as a problem.
Which is cheaper to keep running?▾
The QV 35A. Owners cite affordable third-party brushes, filters and bags as a reason they chose Roborock. L20 Ultra owners, meanwhile, report slower US customer service from Dreame.