im not sure. cuz i just recently updated my itunes to that but for some reason the songs are all scratchy now. The skip like they would on a scratched CD, and its only been since i updated my itunes. but my computer could have messed up while installing it. so im not sure. the set up is a little better, theres a new way of listing all your songs and theres this thing called Itunes Ping on version 10
In my opinion, it's okay. I kinda liked iTunes 9 better for some reason. But hey, everything is bound to change and we have to live with it :)
Yes its pretty good the way it sort everything it will do some stuff by its self.
it has ping haha tho i dont use it but that is like the only main difference