Well you have me thinking – people have said my frame looks too small or I look too big on the bike, either or.. but its all in the riding I guess.
I can’t actually tell you if i would be more comfortable on a larger frame as I havent tried it. It would allow a shorter stem, but looking at the figures – the next frame size up has 15mm more reach. Shorten to a 50mm, and that reach then becomes an extra 5mm.
The wheelbase, top tube and seat tube are all longer, but it doesnt really equal a huge gain in reach.