I visited Uni once when I was young (early 90s - it was a newborn). Since then, I hadn't been until a few weeks ago (May 6). Wife and I were in Orlando for a conference. Stayed on WDW property using certain discounts, and rented a car for the first time ever.
And since wife is a travel agent, we went to Uni to complete her "Certification" program. I'm glad I went. It opened my eyes in more ways that one.
Caveat: I suffer from severe motion sickness. But since we needed to ride as much as possible, I doubled up on my Dramamine and kept my stomach full. The heat didn't help, but I got through the day with my eyes closed a lot. Thus, my opinion of some rides is a bit skewed, only because they made me want to :hurl:
In one way, I quickly realized that Uni is CURRENTLY leaps and bounds beyond Disney in utilizing ride technology and integrating numerous types of effects into one attraction. I'd only heard of all these rides and attractions, and had seen some YouTube videos. But after experiencing things like Simpsons, Spiderman, Mummy and a few others, it quickly became apparent to me that the top dogs at Uni are investing in themselves, instead of the stockholders.
But on the flip side, Universal felt cheap and run down. That park is old, but is in worse overall shape than DHS. Plus, it's like walking through a Midway or down a beach in Jamaica, where people are literally hawking stuff non-stop.
Now, my visit to IoA was overwhelming. The attention to detail is incredible. It's sensory overload. I liken it to the MK, where there's theming and atmosphere no matter where you look. I've never read or seen anything "Potter", but that area of the park was simply awe inspiring. I can see why it drove attendance through the roof. And being the end of our day, I popped some more medicine and braved the new Potter ride (whatever it's called). Ignoring the fact that only 1% of the world's population is healthy enough, or in the perfect condition to ride it....it's simply awesome. Again, my eyes were closed a lot, and my forehead was sweating profusely, but I opened them enough times to appreciate what they had built. Beyond words.
So then I step back and look at my beloved WDW, which I have gone to the defense of for years. And now I'm second guessing myself. Sure, I love the classic rides, and I love the immersive theming of a couple of the parks (my favorite, MK and my least favorite, AK), but if someone who's into amazing rides and thrills goes to Uni first....they're going to be disappointed with WDW.
If you're a family, and you have kids, WDW is the place for you - because you simply couldn't do more than about 2 things at Uni. But if you have teens, or are a couple of young adults, and you go to Uni....you might start scratching your head when you head back over to WDW and wonder where all the thrills and immersive experiences are.
I'm playing Devil's Advocate, of course, because my heart belongs to WDW (obviously). But having experienced Uni/IoA myself, in 2012, I can see where WDW is going to have to step up their game to compete with Uni...who seems to be more in tune with today's youth and society.