It makes sense comparing iRobot Roomba 980 vs iRobot Roomba 614 because they both are able to give some premium features. Based on our rating, Roomba 980 has the overall rating of 8.7 out of 10 versus 5.7 for Roomba 614.
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 43.1 x12.7/'17 x 5 (D x H) cm/inches for the Roomba 614. The weight of the Roomba 980 is 6/13.3 kg/lbs, and for the Roomba 614 it is 5.2/11.5 kg/lbs.
The iRobot Roomba 980 is better robot vacuum in this comparison. Check iRobot Roomba 980 price