don't know - can't really compare...

I mean - I know the music of GNR for as long as I can remember, but I've never seen them live unfortunately. I don't know much from Iron Maiden, but I saw them live a month ago and that was huge! I like the GNR albums better than the Maiden albums... but for me a good band has to be able to put up a good live show as well. So... I really can't decide .