The iRobot Roomba 980 vs iRobot Roomba 671 comparison shows that these robot vacuums have some important differences and common features. Based on our rating, Roomba 980 has the overall rating of 8.7 out of 10 versus 6.7 for Roomba 671.
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 34 x 8.8/13.4 x 3.5 (D x H) cm/inches for the Roomba 671. The weight of the Roomba 980 is 6/13.3 kg/lbs, and for the Roomba 671 it is 2.2/5 kg/lbs.
The iRobot Roomba 980 is better robot vacuum in this comparison. Check iRobot Roomba 980 price