do you want a real answer or the apple jacks one
I looked in google twice for an official sounding answer and all I got were bs websites trying to sell you acai berry type workouts. I did find one piece of advice that made sense; the cut up guy looks better because the other guy has more fat covering his muscles. I think psychologically we are wired to notice muscles more than someone who is a bit bigger but has a lot of fat covering the muscles (can't see the muscles as easily).
My first scientific instinct, and I'm just throwing this out there I don't think its true its just something I was thinking of, was that it had something to do with surface area. Ok imagine a ball made out of wood. Now imagine smashing the wooden ball and it breaks into a dozen pieces of all shapes mostly triangular. Because you exposed angles inside the ball you actually increased the total surface area, versus the ball when it was whole. I don't think this applies here though because the fatter individual probably has more total surface area.
