I have built one GP Cub and 2 CG Cubs and have to agree with GrayBeard, the GP Cub builds easier and more scale like and the kit is much better. If your going for scale go with the GP Cub. The fuse has more of a scale look and the tailfeathers buildnicer. The wing is easier to buid too,and out of the 2 cubs , would be the best for scale. BUT!
. I prefer the GB, just because you can turn it up with a Saito .72, clip the wings, max the throws and have a blast with it. The GP Cub does not respond to this as well, stilll nice flying plane, but you can not pound on it likethe GB.
If you go with the GB Cub, reinforce the landing gear and the cabin wing mount areas. The supplied platic cowls in both kits are junk.