We had a chance to test and compare two robot vacuums: iRobot Roomba S9plus vs iRobot Roomba 650 and this review should help people who are looking for a good robot vacuum. Based on our rating, Roomba S9plus has the overall rating of 8.5 out of 10 versus 6.5 for Roomba 650.
A noticeable difference between two models is the size, which is 30.9 x 8.8/12.2 x 3.5 (D x H) cm/inches for the Roomba S9plus and 34 x 9.1/13.4 x 3.6 (D x H) cm/inches for the Roomba 650. The weight of the Roomba S9plus is 3.6/8.1 kg/lbs, and for the Roomba 650 it is 5.3/11.7 kg/lbs.
The iRobot Roomba S9plus is better robot vacuum in this comparison. Check iRobot Roomba S9plus price