It makes sense comparing iRobot Roomba 675 vs iRobot Roomba 614 because they both are able to give some premium features. Based on our rating, Roomba 675 has the overall rating of 6.5 out of 10 versus 5.7 for Roomba 614.
A noticeable difference between two models is the size, which is 42 x 14/16.5 x 5.5 (D x H) cm/inches for the Roomba 675 and 43.1 x12.7/'17 x 5 (D x H) cm/inches for the Roomba 614. The weight of the Roomba 675 is 3.5/7.8 kg/lbs, and for the Roomba 614 it is 5.2/11.5 kg/lbs.
The iRobot Roomba 675 is better robot vacuum in this comparison. Check iRobot Roomba 675 price