Bissell - Pet Hair Eraser 2390 vs Roborock - Flexi Pro Wet/Dry

The Flexi Pro Wet/Dry edges ahead on the Mars Score (64.6 vs 69.5), but the 4.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.

Pick the Pet Hair Eraser 2390 if you care most about dustbin. The biggest gaps in its favor are dustbin.

Pick the Flexi Pro Wet/Dry if you carry the device everywhere and weight or thickness has been the deciding factor before. Its strongest claims are suction (aw), weight, cordless, among others.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.