When it comes to robot vacuums, the question of single side brush vs. double side brushes doesn’t have a one-size-fits-all answer—it really depends on your home setup and cleaning needs.
Those in favor of single side brushes argue that side brushes are mainly for cleaning along walls and around furniture legs. Brands like Mi, Roborock, and Xiaowa use dynamic speed adjustment—slowing down the brush when not edge-cleaning to avoid scattering dust. Plus, these models typically only clean along one side, making a second brush unnecessary. Single brushes also handle cords better, getting untangled more easily than dual ones. In the West, where carpeted floors are common, single brushes reduce friction and help the vacuum move more smoothly.
On the flip side, double side brushes fans say the extra brush isn’t just for wall-following—it improves dirt collection and widens cleaning coverage. Since Chinese homes usually have hard floors or small rugs, friction isn’t an issue, and the dual brush setup works well.
Bottom line: single for agility, double for coverage. Choose based on your floor type and how picky you are about cleanliness.