The roborock S4 vs Xiaomi Mi Robot comparison shows that these robot vacuums have some important differences and common features. Based on our rating, S4 has the overall rating of 9 out of 10 versus 8.5 for Mi Robot.
A noticeable difference between two models is the size, which is 35 x 9.1/13.8 x 3.6 (D x H) cm/inches for the S4 and 35.4 x 9.6/13.6 x 3.8 (D x H) cm/inches for the Mi Robot. The weight of the S4 is 3.1/7 kg/lbs, and for the Mi Robot it is 3.8/8.4 kg/lbs.
The roborock S4 is better robot vacuums in this comparison. Check roborock S4 price