For those of you who aren't sure if Rock Band 2 or Guitar Hero is harder, here's a good example of one of the harder songs on Rock Band 2. This clip shows an insanely good duo playing "No Regrets" on expert mode with the speed all the way up. They still pull off 98 and 99% accuracy. And if you look closely you will notice that the drummer is Ronald McDonald. I'm sure there are plenty of Ronald McDonalds playing Rock Band, but I dueled against one online. He beat me with a perfect 100% score, and never missed a single note.