The only thing that I can think of, that a smaller radius may make a noticeable difference with, is when you're playing a minor chord shape across the 3 top strings, but playing each note separately, thus needing to roll your finger across those notes. Ex: Em- 1/12, 2/12, 3/12
I'd love to try that on a small radius, because I have trouble keeping those notes separate. Actually, I'm lying. I can't do it.
Does the radius decrease as you go higher on the fretboard on a compound radius guitar, or is it the other way around?