The only difference is the Collar. Barb and Ball. Ball doesn't hold a plastic body as securely as the Barb. Ball is mostly just for Fiber Dressing, Barb is better for Plastics. Barb won't flare Fibers like the Ball will. Barb can be used for Fiber, the Barb will keep the Tie from slipping off of the Collar, but again, Barb won't Flare Fiber. Ball doesn't hold plastics well, Ball is only a slight Friction Fit in a Plastic, Barb grabs the Plastic body.