Roborock Saros Z70 vs Saros 10R

The Roborock Saros 10R is a better robot vacuum than the Roborock Saros Z70. The Saros Z70 is really a Saros 10R modified to accept a robotic arm. The arm bay takes up space and forced Roborock to use a much smaller dustbin and brushroll on the Z70. The Z70's smaller dustbin means it will have to return to the dock much more frequently. The Z70's brushroll gathers hair tangles much more easily. And the robotic arm consumes battery power, leading to lower battery life from the same battery. The Z70 also retracts its side brush on carpet, delivering worse performance here. On the positive side, the Z70's brushroll provides more agitation and is better at picking up pet hair.