I do not like Disney. Thats my opinion. They are too crowded, a lot of the attractions are too old, and the shows are waaaaaaay too lip synched for my tastes. With that being said, I also just recieved an annual pass to WDW. Go figure. Universal does not have the loyalist republic type following that Disney does, but it is just as fulfilling, if not more so than Disney.
IOA

Islands of Adventure for those of you who dont frequent the Central)
Incredible Hulk Coaster: The closest thing to it is Rockin Roller Coaster at MGM...but Hulk is leaps better, and the wait is seldom over 70 mins, unlike RNRC which I have seen at over 2 hours at times. More inversions, faster, bigger...
Storm Force Excellerator: Just like Mad Hatters Tea Party at MK. They are equal in ride length and intensity, though storm usually has a 5 min. wait.
Amazing Adventures of Spiderman: Take all the 3/4D attractions at WDW, mix them with Dinosaur, and you have some kind of idea what Spiderman will be like. Its unlike anything you've seen.
Dudley Do Rights-Ripsaw Falls: A fun flume ride that mixes elements of Splash Mountain at MK. A fun ride, but as for themeing...does not compare to Splash Mtn. But still worth the ride.
Bluto's Bilge Rat Barge: Awesomely fun. Wickedly fast. Ten times longer than Khali River Rapids at AK, and you get absolutely soaked.
Jurassic Park River Adventure: Another great water ride, a combo between Dinosaur and Splash Mtn. This one is a little on the scary side, you come face to face with big T-Rex.
Dueling Dragons: Again...unlike anything you have at WDW. Past this point of no return you must choose: FREEZE OR BURN! A very cool queue and a very intense fun coaster.
Sinbad: A great fun show, much along the lines of Indiana Jones at MGM. A lot of fun, but get there at least 30 mins ahead of time for prime seating.
Carroseusell: Its a caroseul like you've never seen. Fun for all.
One Fish Two Fish Red Fish Blue Fish: Its dumbo, Its alladins camel ride...all in one! Its fun!
Cat in The Hat: No nothing like the movie...thankfully...full of spins and rhymes.. a lot like Pooh at WDW...but with a name like Pooh...Cat in The Hat has to be better....
Add in all the little shows, all the minor parades, all the fun features and playgrounds and you have the best of all four disney parks in one great less crowded theme park. And I havent even started on USF (thats Universal Studios Florida for those of you who dont frequent the Central).
I can say that right now Dudley Do Right and Jaws are down for the season and will not open until at least spring break. If you like this little comparison, I'll continue with my USF comparison.