Sonic Unleashed on Wii – different than 360, PS3 versions

– split of 3d to 3d side-scrolling action is about 50/50

– hub areas for story return once again

– Wii version is not using the same engine as PS3/360, but the team is working hard to duplicate the look as closely as possible

– mix of speed and platforming

– Wii version is different in stage design and controls

– coding and stages for Wii version is being handled by Dimps, who was responsible for Sonic Rush/Sonic Rush Adventure

– Tomoya Ohtani from Sonic Rush will be the sound director

If the Sonic Rush team’s prior work is any indication, I truly think this can be one of the stand-out Sonic games in the franchise.

Source