I ride a road bike and use a B17 Narrow. I've tried a few different saddles, from which one was supposed to be better for the b...s as there's a nice hole in it. Both didn't cause me anything but rubbing and painful perinium.
Since I've been using the B17, I've still had the same painful perinium, but only after I ride it twice as long. It starts getting a bit less comfy after around 75km, but it's manageable for at least 110km. Will do a 120km ride in a few weeks, maybe if the verdict gets busted I'll post here again to restate my conclusion.