Roborock S8 Pro Ultra vs Dreame L40s Ultra
Quick take: The Roborock S8 Pro Ultra costs $30 less; the Dreame L40s Ultra has stronger suction (19,000 vs 6,000 Pa); the Dreame L40s Ultra runs longer per charge (220 vs 180 min).
Which one to buy
Same $470, same promise of tangle-free pet hair, but the Roborock S8 Pro Ultra is discontinued and the Dreame L40s Ultra does more for the money. The Dreame adds what the S8 lacks: a camera for obstacle avoidance, hot-water mop washing, an extending mop and side brush for edges, a 260-minute battery against 180, and a 19000 Pa rating against 6000 Pa.
Both brushes earn praise. S8 owners report zero tangling from its dual rubber rollers, even with several pets. L40s owners say its two counter-rotating rollers swallow hair up to 30cm long and rank it first for heavy shedding. The Dreame's pad washing runs around 75°C, which owners say keeps pads from smelling, while S8 owners report musty pads after a few weeks of cold-water washing unless the dock gets a monthly clean.
The Dreame's weak spot is carpet. Poor carpet performance is its most repeated owner complaint, despite the big suction number. Owners also note a mop tray that doesn't fully detach, pads sometimes left behind at the dock, limited threshold climbing, and standard units that try to eat cords. S8 owners say it's strong on hard floors and low-to-medium carpet but struggles with debris in thick pile, bumps into shoes and pet bowls, and has a 5mm mop lift too low for high pile.
For a shedding-heavy, mostly hard-floor home, the L40s Ultra is the clear choice: current, better equipped and better at mopping. A leftover S8 Pro Ultra only makes sense for a tidy home with more low and medium carpet, where its steadier carpet results matter more than the Dreame's extras.
Roborock S8 Pro Ultra
Only a fit for a tidy home with a fair amount of low to medium carpet, accepting a discontinued model with cold-water pad washing and no camera.
Dreame L40s Ultra
For a mostly hard-floor home with heavy shedding, it's the better-equipped current model at the same $470, with hot-water washing, a camera and an extending mop.
| Spec | Roborock S8 Pro Ultra | Dreame L40s Ultra |
|---|---|---|
| Price | ~$470 | ~$500 |
| Type | Robot Vacuum & Mop | Robot Vacuum & Mop |
| Suction | 6000 Pa | 19000 Pa |
| Battery | 180 min | 220 min |
| Navigation | LiDAR | LiDAR |
| Filtration | — | — |
| Cordless | Yes | Yes |
| Bagged | — | — |
| Noise | 67 dB | 66 dB |
| Dustbin | 400 ml | 310 ml |
| Water tank | 300 ml | 300 ml |
| Self-empty dock | Yes | Yes |
| Auto mop washing | Yes | Yes |
| Hot water washing | No | Yes |
| Obstacle avoidance | No | 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 3.8 in | 13.78 x 13.78 x 3.82 in |
| Weight | 9.1 lbs | 9.04 lbs |
| Warranty | 1 year | 3 years |
Pros & cons
Roborock S8 Pro Ultra
- ✓Dual rubber brush system excels at picking up pet hair without tangles
- ✓Self-washing dock eliminates the grossest part of robot mop ownership
- ✓Sonic mopping vibrates at 3000rpm for surprisingly effective floor cleaning
- ✓Excellent multi-floor mapping — remembers up to 4 floors reliably
- ✓Consistently strong owner sentiment across thousands of verified reviews
- ✗No camera means it can bump into small obstacles like shoes or cables
- ✗6000Pa suction struggles with heavier debris on thick carpet
- ✗Dock does not use hot water, so mop pads can develop odor over time
- ✗VibraRise mop lift is only about 5mm, not enough for high-pile carpet
Dreame L40s Ultra
- ✓Flagship-grade 19000Pa suction and hot water mop washing at a mid-range price
- ✓81% positive owner sentiment — praised for obstacle avoidance and pet hair
- ✓DuoBrush design shrugs off long hair that kills single-roller robots
- ✓MopExtend reaches baseboards and into corners most round robots miss
- ✓260-minute battery covers large homes in a single run
- ✗Carpet performance is good but not class-leading — fine dust stays in thick pile
- ✗Dock takes up serious floor space and the water tanks need weekly attention
- ✗Dreame app notifications are chatty out of the box
- ✗Dreame's own price has swung from $1,400 list to $500 within a year, so check its store before paying a retailer more
Roborock S8 Pro Ultra vs Dreame L40s Ultra: common questions
Is the Dreame L40s Ultra or the discontinued S8 Pro Ultra better for long pet hair?▾
Both are strong. S8 Pro Ultra owners report zero tangling with multiple pets, and L40s Ultra owners say its counter-rotating rollers handle hair up to 30cm without wrapping. The Dreame is current and adds a camera to avoid pet bowls and toys, which tips it for most pet homes.
How does the Dreame L40s Ultra compare with the S8 Pro Ultra on carpet?▾
Neither is a carpet specialist. L40s owners call carpet its biggest weakness despite the 19000 Pa rating. S8 Pro Ultra owners say it handles low and medium carpet well but struggles with debris embedded in thick pile, so it has the steadier carpet record of the two.
Will the S8 Pro Ultra's mop pads smell more than the Dreame L40s Ultra's?▾
Its owners say they can, because the S8 washes in cold water and pads turn musty after a few weeks without a monthly dock clean. The L40s washes at around 75°C, and its owners say the pads come back clean rather than smelling.