Best Robot Vacuums is reader-supported. When you buy through links on our site, we may earn a commission. Details.
We may earn a commission when you buy through links on this page. Learn more.
Dreame X40 Ultra vs Roborock QX Revo Ultra
These two robot vacuums are evenly matched with the same overall score.
Dreame X40 Ultra
8.4/10$900
Last-gen flagship with class-leading mopping, now half its launch price.
Read full review
Roborock QX Revo Ultra
8.4/10$800
The best value Costco-exclusive Roborock for pet households — strong suction, hot mop wash, and Costco's lifetime return policy at $799.
Score Comparison
Dreame X40 UltraRoborock QX Revo Ultra
Overall
8.48.4
Hard Floor
9.29.0
Carpet
8.58.2
Mopping
9.48.5
Navigation
8.67.8
Noise
7.58.2
Smart Features
8.38.5
Maintenance
7.88.7
Specifications
| Dreame X40 Ultra | Spec | Roborock QX Revo Ultra |
|---|---|---|
| $900 | Price | $800 |
| 12000 | Suction (Pa) | 18500 |
| 6400 | Battery (mAh) | 5200 |
| 65.0 | Noise (dB) | 65.0 |
| — | Dustbin (ml) | — |
| — | Water Tank (ml) | — |
| — | Mop Lift (mm) | — |
| — | Height (mm) | — |
| — | Weight (kg) | — |
| LiDAR + 3D Structured Light | Navigation | PreciSense LiDAR |
| ✅ | Self-Empty | ❌ |
| ✅ | Self-Wash Mop | ❌ |
| ✅ | Self-Dry Mop | ❌ |
| ✅ | AI Obstacle | ❌ |
Pros & Cons
Dreame X40 Ultra
Roborock QX Revo Ultra
Pros
- + Massive 18,500 Pa suction handles pet hair on carpet better than most $800 robots
- + Multifunctional Dock 3.0 with hot mop wash, auto-empty, and auto refill
- + Costco-exclusive with lifetime satisfaction guarantee — return it any time, any reason
- + All-rubber main brush prevents pet-hair tangling
- + PreciSense LiDAR maps quickly and works in the dark
Cons
- − Reactive Tech obstacle avoidance misses cables and small objects
- − Slow to find its way back to the dock from random spots
- − Mopping struggles with dried-on stains — needs multiple passes
- − Dustbin can clog mid-run on heavy pet-hair days
- − Only available at Costco — no Amazon stock and no third-party warranty extensions
The Verdict
Both vacuums scored equally. Your choice depends on your specific needs and budget.