An affordable robot vacuum is always a good option to consider, so bObsweep PetHair vs ILIFE A4 comparison definitely makes sense. Based on our rating, both robot vacuums have the same overall rating of 6.
A noticeable difference between two models is the size, which is 35 x 10.7/13.8 x 3.9 (D x H) cm/inches for the PetHair and 31 x 7.6/12.2 x 12.2 x 3 (D x H) cm/inches for the A4. The weight of the PetHair is 3.5/7.7 kg/lbs, and for the A4 it is 2.2/4.9 kg/lbs.