They are really different experiences:
CP - Pooh & Friends
Buffet for B, L, D (more selection, but you get up and down)
Huge, light, airy convervatory-type room
LT - Mickey & Friends
Family-style meal for D (less selection, they serve you while you rest)
Smaller, revolutionary-themed rooms
I would either pick by the characters you are more interested in, or by the menus. LTT has a limited, but classic, menu. If it doesn't appeal to you, CP has an enormous buffet that you should be able to find something at.
We had great character interaction at both of these places.