After playing more, this game is both different and worse than the galaxies by a good bit. There's a whole lot less care put into making everything feel right. Controls feel really stiff, digital (wall jumping feels bad) and the camera is finicky. It's also pretty bland in the same way NSMB is. Ideas are recycled straight from Galaxy 2. Having said that, it's still pretty awesome. If I judged this on its own I'd be more positive, but there's no reason to.
I'm impressed with how efficient they've become at pumping out solid to great 3D Mario games. Galaxy 2 and this are from the same group, right?