It makes sense comparing Samsung POWERbot R7040 vs iRobot Roomba S9 because they both are able to give some premium features. Based on our rating, POWERbot R7040 has the overall rating of 8.2 out of 10 versus 9 for Roomba S9.
A noticeable difference between two models is the size, which is 34.7 x 9.6/13.7 x 3.8 (D x H) cm/inches for the POWERbot R7040 and 30.9 x 8.8/12.2 x 3.5 (D x H) cm/inches for the Roomba S9. The weight of the POWERbot R7040 is 3.9/8.8 kg/lbs, and for the Roomba S9 it is 3.6/8.1 kg/lbs.
The iRobot Roomba S9 is better robot vacuum in this comparison. Check iRobot Roomba S9 price