Better side of trade?

Team A receives: AB, Collins, Powell
Team B receives: OBJ, Connor, Carson

Team A has no running backs after Connor and Carson, team B is 0-3.

Team B wins this. Going from Conner and Carson to Collins and Powell is a significant downgrade, Bell risk aside. AB and OBJ look fairly interchangeable, and while I am confident AB will have his share of insane performances ROS, OBJ is looking good enough to make this worthwhile (and worth the Bell risk) for Team B.