If you’re in the market for a robot vacuum and want to invest in the best, you are probably considering the iRobot Roomba 980 and roborock S4. Based on our rating, Roomba 980 has the overall rating of 8.7 out of 10 versus 9 for S4.
A noticeable difference between two models is the size, which is 53.5 x 14/21 x 17 x 5.5 (D x H) cm/inches for the Roomba 980 and 35 x 9.1/13.8 x 3.6 (D x H) cm/inches for the S4. The weight of the Roomba 980 is 6/13.3 kg/lbs, and for the S4 it is 3.1/7 kg/lbs.
The roborock S4 is better robot vacuum in this comparison. Check roborock S4 price