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The Narwal Flow 2 Ultra wins with a score of 9.1/10. Best for: Hard floor homes that prioritize mopping quality.

The undisputed mopping champion — best FlowWash system with 140°F heated water
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The best-value door into Roborock's S8 platform — a genuine vacuuming beast with class-leading navigation and tangle-free DuoRoller brushes. Just know the base model ships with a plain charging dock, so you empty the bin and rinse the mop yourself.
Read full review| Narwal Flow 2 Ultra | Spec | Roborock S8 |
|---|---|---|
| $1499 | Price | $300 |
| 30000 | Suction (Pa) | 6000 |
| 7000 | Battery (mAh) | 5200 |
| — | Noise (dB) | 67.0 |
| — | Dustbin (ml) | — |
| — | Water Tank (ml) | — |
| — | Mop Lift (mm) | — |
| — | Height (mm) | — |
| — | Weight (kg) | — |
| LiDAR + AI Camera | Navigation | PreciSense LiDAR + Reactive 3D (Structured Light + IR) |
| ✅ | Self-Empty | ❌ |
| ✅ | Self-Wash Mop | ❌ |
| ✅ | Self-Dry Mop | ❌ |
| ✅ | AI Obstacle | ✅ |
The Narwal Flow 2 Ultra is the better choice with an overall score of 9.1/10 — best for hard floor homes that prioritize mopping quality. The Roborock S8 is more affordable at $300 vs $1499.