Guitar Hero is so much fun!!
But yes, it is harder than real guitar, because unless you have to sight-read for some reason, in real guitar you don't have to instantly react to cues on screen. You learn the song at your own pace and then play it without visual cues.
also yeah the shit on expert is absurd, like that Dragonforce song, Through the Fire and Flames. Is that difficult on guitar? I'm guessing so. But it seems the only way to do it on GH on expert is to hit every button all the time.
also it takes me longer to learn songs on GH than it does on real guitar
it's annoying when people who don't play guitar think they're the shit cuz they're good at Guitar Hero. pressing buttons ain't the same as writing your own songs, pal.