You probably can't go wrong with either choice.
For me, having lived in FL for 8 years, I feel like the most reliable month for perfect weather is November. For some reason, our tourist "season" isn't said to start until January, but I think the tourists are missing out on the best month of all.
In November, the bad humidity has passed. The rainstorms have passed. But the cold fronts haven't come yet. So, outside is a lovely room-temperature weather.
Let's face it, weather is a crapshoot. But the most reliable month, IMO, is November. Your first priority should be avoiding crowds, and your second should be easy weather. (By "easy" I mean not-hot not-cold just right!) The other posters are right that it would be nice to see everything all Christmassy, but I guess I'd rather have better weather & fewer crowds, and get my Christmas thrills elsewhere. Sometimes December is just as neutrally-weathered as Nov, but usually Dec = longer cold spells, which means packing/wearing more clothes, and the kids getting chilly after dark, and windy, etc.
So if it were ME, I'd pick the mid-Nov week. JMO