They're two different parks, two completely different demeanours.
Disney ultimately appeals to a younger crowd. When I had the privilege to go in 2001 (I was 15), I had nothing short of a fantastic time there. Though, I felt that much of the time I was haunted by a lingering uneasiness. Things just felt too family friendly, or too child safe. The only attraciton that I felt remotely of age without being with the family or my younger brother at the time was Alien Encounter, Rock'N Roller Coaster, and Tower of Terror. Everything else had a very childesque feel to it...
Universal Studios and Islands of Adventure are still very family friendly, but with a very different appeal and approach. Universal has it's fair share of theming, sure... Not to the extent Disney has gone, but still enough to make you go "wow" and be just as awestruck. What I like about Universal is that their attractions are very raw and very unadulterated. Disney would've never approved a simulated tornado attraction as Universal did with Twister. It's too scary, too intense. Same with Jaws, Terminator, The Mummy's Revenge, and Spiderman.
When you ask someone about Universal Studios, the number one thing they'll recall are the attractions themselves, more so over the actual theming. But when you ask about Disney, you'll 9 out of 10 times get an earfull about the sheer beauty of the park - not so much the attractions. Universal is more about bringing you experiences through their attractions, while Disney is busy submersing you into another world right out of the mind of Disney himself.
Edited by tehFAO, 24 February 2008 - 07:38 AM.