It's the same, as far as I've noticed. I don't think anything on the facade changes from September through early January.
However...one thing I noticed that was different inside the ride is a particular hidden Mickey! When you get to the ballroom scene with the wonderful gingerbread display, during the holiday season there is a 'snowdrift' hidden Mickey on the floor, usually somewhere over on the far right-hand side. I have looked for that hidden Mickey during Halloween Time and have not seen it, but it is there during the Christmas season. The hidden Mickey looks more like a big, white, Mickey-shaped bathroom rug, or a Mickey-shaped mass of cotton, than it does a snowdrift, but it's supposed to be snow.