Guitar Hero 2 is a little bit harder than Guitar Hero.
Some things are made much easier, like descending scales (thanks to easier pull-offs) – I found myself getting 4x multipliers on solos that i’d barely pass on the original. Which probably just means I never learned to play the original properly.
The songs themselves tend to be much faster and more complicated. Even the earlier songs feature some nasty solos on expert. The song choice is also a little questionable, mostly with the songs in the middle parts of the song list. The earlier and later songs are reasonably well known and are quite fun to play but the rest are quite a chore to get through, except for Sweet Child O’ Mine which is fun if a little easy. The game has a good ending though, if you’ve finally managed to nail Hangar 18 on expert you’ll find Free Bird to be an almost relaxing finale (one that happens to be about 8 minutes long).
Yet again the real challenge is in the bonus songs which you have to unlock using money earned during the main game. Trogdor is a bit of fun, Thunderhorse by Dethklok (see Metalocalypse on Adult Swim) is better. Another Freezepop song Less Talk More Rokk is here and at first it seems insane but it’s actually quite easy and is a lot of fun. The hardest song in the game is supposed to be Jordan by Buckethead, something which seems quite believable.
The song which I most enjoy playing is Beast and the Harlot by Avenged Sevenfold, the chorus is bouncy fun.