It's remastered, so it has the best audio and video quality for one. It doesn't have the silly voice over, some scenes are extended (the original unicorn dream has been restored to its full length, too) and of course it doesn't have the retarded ending of the US theatrical release.
It's definitely worth it to check out the work print, too, because while it is unfinished at times, it does have some interesting extended scenes and scenes that never made it into the release versions of the movie.
It's definitely worth it to check out the work print, too, because while it is unfinished at times, it does have some interesting extended scenes and scenes that never made it into the release versions of the movie.