Rock Band 1,2
Guitar: Expert (97% of the songs i can pass [FU Visions!], 90% i can 5 star or greater)
Drums: 90% on Hard, 5 star all on Medium, Can pass a few on expert but haven't tried much
Bass: tends to be easier than guitar but also more boring for most songs, so i don't play it much. (plus i only strum down, so its odd)
Vocals: lol i don't sing!
GH 1,2, 80's
I have beat them all on expert, 5 star 85%-90% (can't remember really, its been awhile)
GH3
pass most songs on Expert but not all yet, can 5 start most on Hard. (guitar messed up)
I personally think Rock Band is better. The guitar responds more accurately, and the songs seem more realalistic. GH3 is just rediculous in terms of difficulty compared to GH1,2. I've read that its because they throw in more notes, such as bass plus the guitar.
I may try the next GH if i have the money to do so, i skipped world tour because GH3 was crap compared to RockBand in terms of play.
Can't wait for RB: Beatles! (i am in need of a new guitar too, lol)