Watching the evolution of Mario since it's inception and the evolution of Sonic pretty much sums up the differences of Sega and Nintendo and one is thriving and the other has been floundering for as long as I can remember. Sonic has never evolved and spent nearly all of the 3D on generations becoming a derivative, shitty me-too franchise while Mario has continuously stayed true to it's roots while evolving the core gameplay and expanding and improving on proven formulas Nintendo created.
Sonic sucks. I didn't even like it when I was a kid.
- developed for the younger crowd - developed by the 'storybook' team (Secret Rings, Black Knight) - storybook franchise has been killed off, following poor sales of Sonic and the Black Knight - not a huge learning curve - marketed to general, mainstream Wii owners - early press hands-on seem positive - Tail's playability may only be available in multiplayer - pointing/touching of in-game items - may have some gameplay elements that liken it to Super Mario Galaxy - playable at E3