rockband is so much better, in GH ther's only guitar..on rockband u can do everything on GH plus use additional 2 instruments....u ot the guitar drums and u can sing, rockband panz gh
for guitar, obviously GH3, but Rock band for being able to play drums and sing. I think GH3, because I love playing real guitar and that makes me good at it, and Rockband's guitar sucks
GH3 is game that you could play by yourself and rockband is like a multiply person game so i would take GH3 because i would only play it myself so it would be easier