No, not really. The link to the 28 games is a moot point since the gizmodo can run almost all of the emulators on the market. Meaning instead of maybe 200 games the psp could have in its life cycle. you could own a gizmodo and have over 5000 easy. Between arcade, nes, GB, GBA, genesis, Turbo, etc...
It just depends on your focus. I am considering both because I believe you can actually enjoy a game that doesn't have procedural textures and bump mapping just as much as one that only has sprites and vice versa.
The old GamePark32 is another option as well.