| They're not even comparable, just get rockband. Still get good music AND you can play the guitar/drums/mic as apposed to ONLY being able to play the guitar.
You don't need someone to play all 4, you can play by yourself or with 2/3/4 people. Guitar hero was cool, but rock band just kinda blew it out of the water. But, maybe that's just me because I can drum better than I can do the guitar. haha. | 
