I'll add another post to this one since it's still going. For me, as a CCW, a revolver carries much more comfortably than a similarly sized (or even smaller sized) semi-auto. I guess it's just the difference in shape.
For example, I know from experience that I can carry a 4" barreled Taurus 65 more comfortably than my XD40SC, even using the holster that was made for the XD, and the 65 conceals just as well if not better.