well i like gh2 for the x-box 360 because they have the original "We are the pirates that dont do anything" by relient k but rockband beats the crap out ov gh3
I really like them both, but if i had to pick i'd say GH3 because it has been around longer and has hada time to fix the bad things about the game(s) and it has WAY better songs for the most part.
guys who think rock band is good are retarted. i mean seriously GH3 is way better than rock band. rock band is just a scam by their company. GH3 rocks!
ive never played rock but i have gh3 but if i have to pick one id go with guitar hero bacause rock band stole gh idea and made it into more instruments and guitar hero has a lot more songs over 70 on the disk + a lot more and on xbox live a lot more songs are there and a bunch of them are for free some of the free online artists are foo foghters and motorhead