Very similar.
First, when you enter the park, go to the left and visit Guest Relations and explain your issue. They will issue you a special card that has your name, party size and a barcode. You use that to show at the entrance of rides, depending on the issue, you can either enter or get a return time. All rides have elevators if needed and other ADA access.
One big issue is the access between the Upper and Lower Lot. Most folks use a series of 4 different escalators to get between the two areas. A Shuttle bus system is used for those who need to avoid the escalators. This includes one elevator, and loading/unloading the ECV including strapping it down, so plan to do the lower lot all at one time, and plan for the extra time needed using the shuttle.
There is a special loading area for the Tram Tour, which also requires strapping down the ECV/Wheelchair. This is separate than the main queue. (You are pre-loaded prior to the main platform).
http://www.universalstudioshollywood.com/faqs/ada-information/
Interesting to note, Universal was the first main park to offer rest stops for service dogs.