I can only speak from experience from the mid-90's (and can't comment on the Studios park), but yeah definitely go there if you possibly can. Must-do attractions-
Pirates of the Caribbean- blows all the other versions out of the water. Especially if you've only visited Florida's (which if just puny in comparison). Of all the DLP attractions, this one is the best IMO and a must see. It's arguably one of the best Disney attractions i've ever been on. Far longer with more scenes and an extra drop (more thrilling drop too). Story is really well paced now too, and it's overall much better designed.
Phantom Manor- i won't argue it being superior to WDW's, but it's totally unique and has a completely different story with some different scenes. Again, do this one due to the incredible differences. A great ride too! The new story ties into Big Thunder Mountain even.
Big Thunder Mountain- The best version of the coaster in any park. It feels smoother and faster than the others. Overall more thrilling. It even sits on its own island, with the loading and unloading happening on the mainland but the actual ride traveling under the river to get to the main island. Very unique and has some more extensive dark parts than other versions. Highly recommended.
Go on any dark ride at Fantasyland. Since you've never been to any other park besides WDW, Pinocchio will be new to you and is a charming dark ride. All the other dark rides are considerably different and better than their WDW counterparts, which more advanced and elaborate scenes, figures, and special effects. Peter Pan is especially fun IMO. You also might want to try out Small World for the different facade and some new American-centered show scenes. And check out anything else not at WDW (i rode Storybook Canals and even the Casey Jr train).
Space Mountain is totally unique from any other. I've never been on it personally, but it has loops and corkscrews and travels far faster than WDW's. Suffice to say, far more thrilling than others. I've heard it's very fun and well designed, but also uncomfortable to ride.
That's all i can recall at the moment. Most of all, enjoy the most beautiful Magic Kingdom style park. Just walk around and marvel at how gorgeous the place is. Sad to hear it's fallen into some disrepair lately, but it is still pretty i hear.
