Many say the B-Sports are harsher than the B-HDs. HDs and Sports are more harsh than OEM shocks overall, which are the SACHS, even when paired with OEM springs. I believe that f you get the B-Sports, you need to ahve lowered springs as the Sport shock is shorter than the HD shock.
I've got Bilstein HDs in the mail for delivery (can't wait!). I'm pairing them with OEM non-sport springs. I'll let you know how they ride once they arrive and I have them installed.