It's interesting to see the variety of opinions on this thread.
For me, FF is the winner, hands down. The food is unbelievable. I'm a foodie, and I'd have to say that two of the best meals I've ever had in my LIFE were at FF. Service is going to vary by server at either restaurant, obviously, but the service at FF is impecable.
I'm not so impressed with CG. Yes, the view's fantastic, and watching Wishes from the top of the Contemporary is magical. But the food and service, imo, was only good. In fact, I'd have to put the service down as fair. As I said earlier, service will vary by server and by night, so I don't assume it's that way all the time, but on our last visit we waited 20 minutes for water. We saw our server maybe 5 times throughout the evening -- she wasn't available to check on us, to refill drinks, etc. The entrees were good, but not exceptional (I don't remember what we ordered), and the dessert selection was abysmal. And disappointing when we got what we ordered.
I don't even have to think about it -- FF is a must-do, and CG is probably never going to happen again.