I think it's actually a pretty cool idea. Do you understand the concept? From what I gather, you have 2 different competing genres of music competing at once, each playing the same song, and whoever's winning gets played at that current time. I don't think they're competing with Guitar Hero or RockBand, it's completely different than those 2 games.
Edit - I guess you could compare it to the Boss Battles in GH3, but you use the Wiimote for gesture based attacks instead of a Guitar controller.