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- S7 vs S9
Roborock S7 vs Viomi S9
What S7 does better (3) and where S9 wins (0) — every spec side by side.
Why is S7 better than S9?
- Dustbin (robot)450 ml vs 300 ml+50%
- Water tank (robot)300 ml vs 250 ml+20%
- Charging time300 min vs 360 min+20%
Why is S9 better than S7?
S9 has no measurable advantages in this pair.
Specifications
Side by side
| Suction & cleaning | ||
| Dustbin (robot) | 450 ml | 300 ml |
| HEPA filter | Yes | — |
| Noise level | 60 dB | — |
| Navigation & obstacles | ||
| Navigation | Laser (LiDAR) | Laser (LiDAR) |
| Navigation sensors | LiDAR laser (LDS), Cliff sensors | LiDAR laser (LDS) |
| Obstacle avoidance | Basic sensors (infrared / bumper) | — |
| Threshold climbing | 20 mm | — |
| Room mapping & room selection | Yes | Yes |
| Mopping | ||
| Water tank (robot) | 300 ml | 250 ml |
| Base station | ||
| Base station | Charging dock | Charging dock |
| Battery & runtime | ||
| Runtime | 180 min | — |
| Charging time | 300 min | 360 min |
| Size & weight | ||
| Height | 96 mm | — |
| Shape | Round | Round |
| Colours | White | White |
| App & smart home | ||
| App control | Yes | Yes |
| Voice assistants | Amazon Alexa, Google Assistant, Apple Siri | — |
| Remote control | Yes | — |
