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Dreame L40 Ultra vs iRobot Roomba Combo j9+
The Dreame L40 Ultra wins with a score of 8.4/10. Best for: Pet households with mostly hard floors and large open spaces.
Winner
Dreame L40 Ultra
8.4/10$599
The Dreame L40 Ultra delivers near-flagship cleaning performance and the longest battery efficiency we've measured at a mid-range price.
Read full review
iRobot Roomba Combo j9+
7.6/10$899
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 reviewScore Comparison
Dreame L40 UltraiRobot Roomba Combo j9+
Overall
8.47.6
Hard Floor
9.08.2
Carpet
8.07.8
Mopping
8.56.0
Navigation
8.88.0
Noise
7.57.0
Smart Features
8.57.5
Maintenance
8.88.0
Specifications
| Dreame L40 Ultra | Spec | iRobot Roomba Combo j9+ |
|---|---|---|
| $599 | Price | $899 |
| 11000 | Suction (Pa) | 5500 |
| 5200 | Battery (mAh) | 4460 |
| 65.0 | Noise (dB) | 67.0 |
| — | Dustbin (ml) | — |
| — | Water Tank (ml) | — |
| 10.5 | Mop Lift (mm) | — |
| — | Height (mm) | — |
| — | Weight (kg) | — |
| LiDAR + 3D Structured Light | Navigation | vSLAM Camera |
| ✅ | Self-Empty | ✅ |
| ✅ | Self-Wash Mop | ❌ |
| ✅ | Self-Dry Mop | ❌ |
| ✅ | AI Obstacle | ✅ |
Pros & Cons
Dreame L40 Ultra
Pros
- + 11,000Pa suction handles hard floors with ease
- + Class-leading battery efficiency (194 min runtime)
- + TriCut anti-tangle brush handles long hair well
- + 60°C hot water mop wash and auto-dry
- + Built-in voice control + Matter, Alexa, Google, HomeKit
Cons
- − Lower carpet performance vs flagship X40
- − Mop pad retention occasionally drops a pad
- − Louder than premium competitors at full power
- − Mopping won't replace deep manual cleaning on heavy stains
iRobot Roomba Combo j9+
The Verdict
The Dreame L40 Ultra is the better choice with an overall score of 8.4/10 — best for pet households with mostly hard floors and large open spaces. The Dreame L40 Ultra is more affordable at $599 vs $899.