The BRAD solves a problem (at least it was for me at the last zoo), the Black Rapid has otherwise already solved with the RS-Sport: Depending on the use of the RS-7 can slip here and there and then hook because the camera on shoulder pads stuck. This is tolerable, but occasionally prevents a good picture, because then it fights instead of the model with the belt.
Ergo, I have grown to BRAD, and already is the belt where it is (incl. The JOEY bags) No more slipping, no accidental drop.
Top for me.
PS: OK, you might as well buy the RS-Sport, but since I had the RS-7 now before ... For the initial purchase, however, is worth the comparison between RS-7, RS-Sport and the others. Just try