If there's one thing that's improved, then it's the X360 version. You get all the content changes that were made for DKS as well as a new camera which lends itself better to combat, a new and more polished user interface,better performance and better looking gfx and a whole bunch of minor improvements - it really is a big difference.
The only downside is that you can't load your existing ED savegames - for that, there's been too many content changes.
Thanks a lot for your reply ! Not a big problema if I cannot re-load past saves as it was my intention to start a new game from the beginning...I'm sure the improvements you confirmed will be more than a reason to play again the game...I love games like this one and I would like to see more of them on consoles (there are different opinions, but despite I have a "PC Ninja" I prefer enyway to play my games on my bed, with a pad and in front of a larve TV... :-D).
Hope the Divinity saga will continue also on consoles.