Gametrailers has a video that compares Super Mario Galaxy with Mario Sunshine. Before you watch it, I want you to look at a few key areas.
1) Level Design (they are quite similar)
2) Control Scheme / Camera (they are quite similar)
3) Character Models (practically identical)
4) Art sty1e(indistinguishable)
5) Voice acting (LOLers!!)
So much for all of this supposed innovation. I wonder why Sunshine flopped hard, yet a derivative rehash several years later which looks nearly identical is some kind of genre defining blockbuster.