I suggest a totally different view. NOISE. Did you ever hear a RB67 "go off" in a quiet church. Click, Blam, buzz, click Slam, clomp. The Rollei is very quiet. Both the RB and Rollei can make excellent photographs.
I observed one of the top wedding photographers a few times. He is flown around the country by his very up scale clients. What makes him the best? Great photographs, absolutely. However, in addition he knows how to act. He is polite, knows when to speak and when not to. No showboating. You would hardly know he was at the wedding and reception.