bestatbestThe best product at the best price

↑ ↓ move↵ openEsc close

Comparing 2 robot vacuums

Your shortlist side by side: today’s price, our score and every fact the maker states.

Green is the best of these 2, also when they share the lead.

SwitchBot S20 × Best on 2 facts Roborock Saros 20 Flow × Best on 5 facts
The facts that decide most
Lowest price – 1,299 €Roborock (brand store)
Score not in our ranking 8.8
Customer rating – –
Tests – Just A Dad Approved
Suction power higher is better 10,000 Pa 36,000 Pa best
Runtime per charge longer is better 180 min 301 min best
Climbs thresholds up to higher is better 20 mm 45 mm best
Robot height lower is better 11.5 cm 9 cm best
Mop lift on carpet higher is better – 15 mm
Dust bag lasts longer is better up to 90 days best up to 65 days
Navigation not judged LiDAR turret retractable LiDAR
Rank
Rank – rank 1 of 64 with an all-in-one station
Mopping
Mop type same on both roller mop roller mop
Automatic mop detach same on both no no
Washes the mop same on both yes yes
Hot-air drying same on both yes yes
Station
Station same on both all-in-one station all-in-one station
Plumbing hookup yes (best) no (assumed)
Brush and obstacles
Anti-tangle brush same on both yes yes
Obstacle avoidance same on both AI camera AI camera
Climbing system for high thresholds no (assumed) yes (best)
Noise and age
Noise not judged – 67 dB
On the market since September 2025 September 2026
Suction and brushes
Extending side brush yes no (assumed)
Carpet detection detects carpet and boosts suction –
Suitable for pet hair same on both yes yes
Dirt detection – yes
Mopping
Mop extends to the edges no (assumed) yes
Mop refreshed while mopping same on both yes yes
Water tank in the robot – 67 ml
Dock
Empties the dust bin same on both yes yes
Bagless same on both no no
Dust bag capacity 4 l 2.7 l
Dries the mop same on both yes yes
Dispenses detergent same on both yes yes
Clean water tank 2.7 l –
Dirty water tank 2.5 l –
Wash temperature – 100 °C
Navigation and obstacles
Camera on board same on both obstacle camera obstacle camera
Stair-edge sensors same on both yes yes
Double threshold (two steps together) – 88 mm
Robot
Robot diameter 36.5 cm 35.3 cm
Robot weight 5.5 kg 5.2 kg
Dust bin in the robot 310 ml 245 ml
Battery
Battery capacity 4,000 mAh 6,400 mAh
Charging time 4 h 2.5 h
Smart features and warranty
Matter same on both yes yes
Voice assistants Alexa, Google Assistant, Apple Home Alexa, Siri, Google Home
Warranty 1 year 2 years
Scheduled runs same on both yes yes
Home Assistant – official integration

Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.

We keep your report and the address of this page, not your name, email address or IP address.