Roborock Qrevo Curv S5X
For buyers who want the Qrevo Curv’s cleaning features and round dock at a lower price, without its threshold-climbing chassis.
Amazon $599.99$599.99
The Roborock Qrevo Curv S5X is the better robot vacuum overall, rated 4.4 to 3.9. The Roborock Qrevo Curv S5X leads on cleaning. The Dreame X40 Ultra wins on navigation and mopping. The Dreame X40 Ultra costs $10 less ($589.99 vs $599.99).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Dreame X40 Ultra
Dreame’s 2024 flagship, now hard to find new; worth it only at a deep discount, as the X50 and L-series robots clean better.
Amazon $589.99$589.99
Which should you buy?
- Choose the Roborock Qrevo Curv S5X for cleaning (measured 93% of sand from carpet, 89.2% of pet hair, no hair tangled vs measured 80% of sand from carpet, 75.5% of pet hair, some hair tangled (0.8)).
- Choose the Dreame X40 Ultra for navigation (LiDAR + camera vs LiDAR + 3D light) and mopping (Dual spinning pads, leaves its mop at the dock for carpet, extends to edges vs Dual spinning pads, lifts 10 mm, extends to edges).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every self-cleaning dock robot vacuum; a clear win is highlighted. How we rank explains each one.
| Factor weight | Roborock Qrevo Curv S5X | Dreame X40 Ultra |
|---|---|---|
| Overall rating | 4.4/5 | 3.9/5 |
| Cleaning 30% | 90 measured 93% of sand from carpet, 89.2% of pet hair, no hair tangled | 37 measured 80% of sand from carpet, 75.5% of pet hair, some hair tangled (0.8) |
| Value 25% | 67 $600 | 68 $590 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, optional water hookup | 90 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent |
| Navigation 15% | 85 LiDAR + 3D light | 100 LiDAR + camera |
| Mopping 10% | 76 Dual spinning pads, lifts 10 mm, extends to edges | 86 Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
Independent tests
Roborock Qrevo Curv S5X
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 93% | 89.2% | 0 | 1,528 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet; 7 in hair tangle on hard floor (0 = none wrapped). |
Dreame X40 Ultra
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 80% | 75.5% | 0.8 | 1,287 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Roborock Qrevo Curv S5X | Dreame X40 Ultra | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 18,500 Pa | 12,000 Pa |
| Main brush | DuoDivide floating anti-tangle brush | Liftable rubber brush (TriCut Brush 2.0 sold separately) |
| Dustbin | 325 mL | 300 mL |
| Extending side brush | Yes | Yes |
| Mopping | ||
| Mop | Dual spinning pads, lifts 10 mm, extends to edges | Dual spinning pads, leaves its mop at the dock for carpet, extends to edges |
| Mop lift | 10 mm | 10.5 mm |
| Leaves mop at dock | No | Yes |
| Extending mop | Yes | Yes |
| Water tank | 72 mL | 80 mL |
| Dock | ||
| Dock | Washes mop + empties | Washes mop + empties |
| Self-empties | Yes | Yes |
| Dust bag | - | 3.2 L |
| Washes mop | Yes | Yes |
| Hot-water wash | Yes | Yes |
| Hot-air drying | Yes | Yes |
| Detergent dosing | - | Yes |
| Water hookup option | Yes | No |
| Clean water tank | - | 4.5 L |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR + camera |
| Obstacle avoidance | Structured light (Reactive Tech) | RGB camera plus 3D structured light, recognises 120 object types |
| Climbs thresholds | 20 mm | 22 mm |
| Matter | Yes | - |
| Voice assistants | - | Alexa, Siri, Google Home |
| Build | ||
| Height | 3.9 in (98 mm) | - |
| Retracting LiDAR | No | - |
| Battery | 5,200 mAh | 6,400 mAh |
| Run time | Up to 3 h 10 min | - |
| Warranty | - | 3 years |
| Released | 2025-03 | 2024-04 |