We may earn a commission when you buy through links on this page. Learn more.
iRobot Roomba Combo j9+ vs Roborock QX Revo Ultra
The Roborock QX Revo Ultra wins with a score of 8.4/10. Best for: Pet owners who shop at Costco and want a fully-automated dock without paying flagship prices.
iRobot Roomba Combo j9+
The premium Roomba with the best pet-waste avoidance in the industry, but its basic wipe-only mopping falls short of Roborock and Dreame flagships.
Read full review
Roborock QX Revo Ultra
The best value Costco-exclusive Roborock for pet households — strong suction, hot mop wash, and Costco's lifetime return policy at $799.
Score Comparison
Specifications
| iRobot Roomba Combo j9+ | Spec | Roborock QX Revo Ultra |
|---|---|---|
| $899 | Price | $800 |
| 5500 | Suction (Pa) | 18500 |
| 4460 | Battery (mAh) | 5200 |
| 67.0 | Noise (dB) | 65.0 |
| — | Dustbin (ml) | — |
| — | Water Tank (ml) | — |
| — | Mop Lift (mm) | — |
| — | Height (mm) | — |
| — | Weight (kg) | — |
| vSLAM Camera | Navigation | PreciSense LiDAR |
| ✅ | Self-Empty | ❌ |
| ❌ | Self-Wash Mop | ❌ |
| ❌ | Self-Dry Mop | ❌ |
| ✅ | AI Obstacle | ❌ |
Pros & Cons
iRobot Roomba Combo j9+
Roborock QX Revo Ultra
- + 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
- − 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
The Roborock QX Revo Ultra is the better choice with an overall score of 8.4/10 — best for pet owners who shop at costco and want a fully-automated dock without paying flagship prices. The Roborock QX Revo Ultra is more affordable at $800 vs $899.