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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.

Roborock QR 598 × Best on 1 fact Roborock Saros 20 Flow × Best on 8 facts
Most important facts
Lowest price € 299bol.com best € 1,299Roborock (brand store)
Score not in our ranking 8.8
Customer rating ★ 4.5 · 6 reviews –
Tests – Just A Dad Approved
Suction power higher is better 8,000 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 9.7 cm 9 cm best
Mop lift on carpet higher is better 10 mm 15 mm best
Dust bag lasts longer is better up to 49 days up to 65 days best
Navigation not judged LiDAR turret retractable LiDAR
Rank
Rank – rank 1 of 79 with an all-in-one station
Mopping
Mop type spinning pads roller mop
Automatic mop detach same on both no (assumed) no
Washes the mop same on both yes yes
Hot-air drying no yes (best)
Station
Station same on both all-in-one station all-in-one station
Plumbing hookup same on both no no (assumed)
Brush and obstacles
Anti-tangle brush same on both yes yes
Obstacle avoidance 3D sensor (structured light) AI camera
Climbing system for high thresholds no yes (best)
Noise and age
Noise while cleaning not judged 65 dB 67 dB
On the market since December 2025 September 2026
Suction and brushes
Extending side brush same on both no (assumed) no (assumed)
Suitable for pet hair same on both yes yes
Dirt detection – yes
Mopping
Mop extends to the edges no yes
Mop refreshed while mopping same on both yes yes
Water tank in the robot 80 ml 67 ml
Dock
Empties the dust bin same on both yes yes
Bagless same on both no no
Dust bag capacity same on both 2.7 l 2.7 l
Wash temperature cold water 100 °C
Dries the mop same on both yes yes
Dispenses detergent no yes
Navigation and obstacles
No-go zones zones in the app –
Double threshold (two steps together) – 88 mm
Camera on board – obstacle camera
Stair-edge sensors – yes
Robot
Robot diameter same on both 35.3 cm 35.3 cm
Robot weight 3.57 kg 5.2 kg
Dust bin in the robot 330 ml 245 ml
Battery
Battery capacity 5,200 mAh 6,400 mAh
Charging time – 2.5 h
Smart features and warranty
Matter no yes
Voice assistants Google Assistant Alexa, Siri, Google Home
Warranty same on both 2 years 2 years
Home Assistant same on both official integration official integration
Scheduled runs – yes

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.

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