We haven't stayed at the CR, but we love the Poly. We love the tropical atmosphere, the pool, the beach for watching the fireworks, and Captain Cooks for quick CS meals. With that said, we are giving the CR a try in December. As the pp said, the rooms are about the same size and they're both on the monorail, with the CR being within walking distance to MK and the Poly being within walking distance to the TTC to catch the Epcot monorail. I think the Poly is more appealing as far as theme/decor, but for room size and location/transportation, I don't think you can go wrong with either one. Good luck deciding, although I think you'll have a great trip no matter which resort you choose.