iRobot Roomba 691 can work on 20 minutes longer then Shark IQ Robot Self-Empty XL - 120 and 100 minutes respectively.
Why chose a Shark IQ Robot Self-Empty XL
Vacuum cleaner Shark IQ Robot Self-Empty XL on 0.5 cm lower then his opponent (8.8 cm). This will allow him to arrive where the iRobot Roomba 691 cannot.