Its hard to describe, but once you see em, you'll see that all 3 of the saddles you're asking about are pretty different.
I've got a pair of Regal Ti railed saddles now. They're comfy for me. Wider thru the rear and a flat profile front to back. Fairly narrow nose. I wanted to try one since Boonen likes em and LeMond rode em for eons 'back when.'
Rollses are more like Turbos. IIRC they're a little narrower thru the rear and slightly wider thru the front. Flat front to back. IIRC they do kind of have a 'crown' to the shape going from side to side. (again IIRC its been a while since I've had one)
Concors (and the Concor light) are even narrower thru the rear and have a pronounced dip in the middle of the body of the saddle ala the Aliante.
I've had all 3 at different times in my life. They've all worked, but I still prefer Flites and that shape to em all tho.
M
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