Hey look, the exact same game again with different box art, music and the colors might come in a slightly different order, I say might 'cos I bet you could copy them all from the first game and it would take ages before anybody realized.
This is getting worse than sports sims and Mario, I have always had a hate for these rhythm games but this is getting ridiculous.
Once you have played one, you have played them all. You could slap any name on it, upload all there songs and put it on the shelves to make thousands.