I think more of the Christmas things will be available in December if that's of interest to you. Seems like Candelight Processional doesn't start until after Thanksgiving. I think the tree in the MK wouldn't be up in November that early and some of the decorations. Also the gingerbread houses in the GF and Beach Club resorts - if you want to see those. I can't remember what all the differences are and when exactly. I was trying to decide the same thing once and picked December just to see the additional Christmas stuff. I agree the crowds and weather could be better if you go ahead of Thanksgiving. I have been twice in December and the weather was good both times - t-shirt and shorts weather. You simply cannot count on the weather in December though! I love the
MVMCP - take a look at doing that if you're interested - and I think it starts early November so would work for either time frame.