Have you checked out the first page of this thread? It is pretty full of information & will probably be the most comprehensive list of what the party entails. There are characters in Christmas outfits, special stage shows, plus the Christmas parade & fireworks that are only during the party. Right now the first page has info from previous years but again, the OP will update with this year's offerings once the parties start. That should help you make a decision.
Thank you - yes I read the first page, I guess I am just trying to figure out which out of those events listed don't happen at any other time. I guess maybe the answer is all of them? Except for some of the characters, like Mickey, Ariel, etc I know we can meet during regular park hours.