Roborock Saros 20 Flow vs Roborock Saros 20 Sonic

The Roborock Saros 20 Sonic, on connectivity and on the specifications it publishes. It supports 5 GHz Wi-Fi and Bluetooth, publishes its tank and bin sizes, and sits lower at 79.8 mm, while the Roborock Saros 20 Flow is 2.4 GHz only and leaves those sizes unpublished, though it runs longer at up to 301 minutes.

Wireless support and documentation. The Roborock Saros 20 Sonic offers dual-band 2.4 GHz and 5 GHz Wi-Fi plus Bluetooth and publishes its tank and bin capacities, while the Roborock Saros 20 Flow connects on 2.4 GHz only and leaves those unpublished, though it runs up to 301 minutes against 190. Both are rated at 36,000 Pa.

On the shared specs, yes. Both are rated at 36,000 Pa with LiDAR navigation, obstacle avoidance, multi-room maps and no-go zones, and both docks empty, wash, dry and dose detergent with the mop lifting on carpet.

The Roborock Saros 20 Sonic. It is 79.8 mm tall against 89.8 mm for the Roborock Saros 20 Flow, so it fits under low sofas, beds and cabinets that the taller model cannot reach.

Buyers who want the longest run per charge and the slightly smaller and lighter dock of the pair, whose furniture sits high enough for an 89.8 mm robot, and who do not need 5 GHz Wi-Fi or published capacity numbers.

Buyers who want dual-band Wi-Fi and Bluetooth, documented tank and bin capacities, and a lower body that clears more low furniture, while keeping the same suction and self-maintenance as the Flow.