Sonic Pocket Adventure's levels were basically mish-mashes and remakes of the original trilogy's stages with different names and level design, even the music is from the trilogy games. Most of it is Sonic 2 with a little Sonic 1 inspiration, and Sonic 3 music.
EDIT: Oh, and it had good physics.
Though I don't feel like you can really compare the two, they're sort of two different things which each have their own pros and cons.
EDIT: Oh, and it had good physics.
Though I don't feel like you can really compare the two, they're sort of two different things which each have their own pros and cons.