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- Robot Vacuum S40 Pro vs Robot Vacuum X20 Pro
Xiaomi Robot Vacuum S40 Pro vs Xiaomi Robot Vacuum X20 Pro
What Robot Vacuum S40 Pro does better (3) and where Robot Vacuum X20 Pro wins (3) — every spec side by side.
vs
7.6Cleaning power5.0
5.0Navigation8.2
7.0Mopping6.7
5.9Battery5.2
Dimensions
Size comparison
Robot Vacuum S40 ProRobot Vacuum X20 Pro
| Robot Vacuum S40 Pro | Robot Vacuum X20 Pro | Difference | |
|---|---|---|---|
| Height | 99 mm | 97 mm | +2 mm |
| Width / diameter | 355 mm | 350 mm | +5 mm |
| Length | 355 mm | 350 mm | +5 mm |
| Weight | 4.2 kg | 3.7 kg | +0.5 kg |
Drawn to the same scale from the official dimensions (front and side).
Why is Robot Vacuum S40 Pro better than Robot Vacuum X20 Pro?
- Suction power15,000 Pa vs 7,000 Pa2.1×
- Runtime180 min vs 160 min+12%
- Cleaning area per charge180 m² vs 120 m²+50%
Why is Robot Vacuum X20 Pro better than Robot Vacuum S40 Pro?
- Obstacle avoidanceBasic sensors (infrared / bumper) vs AI camera
- Base stationCharging dock vs All-in-one dock (empty + wash)
- Height99 mm vs 97 mm+2%
Specifications
Side by side
| Suction & cleaning | ||
| Suction power | 15,000 Pa | 7,000 Pa |
| Dustbin (robot) | 430 ml | — |
| Main brush | Single main brush | Single main brush |
| Anti-tangle brush | Yes | — |
| Side brushes | 1 | 1 |
| Extending side brush | Yes | — |
| Carpet detection | Yes | Yes |
| HEPA filter | Yes | — |
| Noise level | 65 dB | — |
| Navigation & obstacles | ||
| Navigation | Laser (LiDAR) | Laser (LiDAR) |
| Navigation sensors | LiDAR laser (LDS), Wall sensor, Cliff sensors | LiDAR laser (LDS), Wall sensor, Cliff sensors, Ultrasonic sensor |
| Obstacle avoidance | Basic sensors (infrared / bumper) | AI camera |
| Threshold climbing | 20 mm | — |
| No-go zones / virtual walls | — | Yes |
| Room mapping & room selection | Yes | Yes |
| Mopping | ||
| Mop type | Rotating mop pads | Rotating mop pads |
| Mop lifting on carpets | Yes | Yes |
| Mop lift height | 10 mm | 10 mm |
| Extending mop (edges) | Yes | — |
| Water tank (robot) | 310 ml | — |
| Base station | ||
| Base station | Charging dock | All-in-one dock (empty + wash) |
| Auto-empty dust station | — | Yes |
| Dust bag (dock) | — | 2.5 l |
| Mop washing in the dock | — | Yes |
| Hot-air mop drying | — | Yes |
| Automatic water refill | — | Yes |
| Clean water tank (dock) | — | 4 l |
| Dirty water tank (dock) | — | 3.8 l |
| Battery & runtime | ||
| Battery capacity | 5,200 mAh | 5,200 mAh |
| Runtime | 180 min | 160 min |
| Charging time | 360 min | 360 min |
| Cleaning area per charge | 180 m² | 120 m² |
| Size & weight | ||
| Width / diameter | 355 mm | 350 mm |
| Length | 355 mm | 350 mm |
| Height | 99 mm | 97 mm |
| Weight | 4.2 kg | 3.7 kg |
| Shape | Round | Round |
| Colours | White | White |
| App & smart home | ||
| App control | Yes | Yes |
| Voice assistants | Amazon Alexa, Google Assistant | Amazon Alexa, Google Assistant |
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