galaxy over galaxy 2 is bizarre.
galaxy being "fresher", since it was the unveiling of the concept and not the refining of it is the only reasoning I can really think of behind it.
Yeah it's odd, especially as the text in the countdown says "Super Mario Galaxy 2 provides a whole sky full of such worlds as Nintendo once more displays a magic touch that elevates this to the pinnacle of Marios 3D adventures".
That said although SMG2 would be my GotG it can never match the impact SMG had so I can kind of understand them giving the nod to the later (although not the gap between them).