W have done both, as well. Like pixiepower said , where Disney is a story, the universal is more dancing flame twirling etc, they get the kids on stage, and a few people as well ,is not bad.
food is excellent and plenty of it ,same with the drink.
We are at a table with people from, Chicago, and Think it was kentucky, all where very nice, the guy got fed up waiting on the waiters , so him and i just went up and got our own, was a lot quicker.
We have not been for a couple of years, and we always stay at RPR, and where able to book it on the day if we had wanted to go in July, although i would book it in adavance if you wanted to go.