I will be going to Universal Hollywood for the first time in August. I have been to Universal Orlando many many times. Are the rides that are at both parks different at all?(Mummy, Simpsons, Jurassic Park, etc)
Never been to Universal Orlando ( WDW is too close to leave it) but I've heard that it's WAY bigger. You can easily do the one here in 1 day, especially if you pay attention to the show schedules - and ride the tram later in the day ( everyone heads there first). Actually head downstairs to where the Mummy & Jurasic park are early - most visitors don't find that area till later.
The Simpsons is identical (it's a film). The others are similar, but there are some differences. I did a back to back trip hitting east coast Universal and Disney then their west coast counterparts.
Mummy is shorter as is Jurassic Park. As Frikitiki said, Simpsons
is a movie so it is exactly the same as is T2-3D. What Orlando
doesn't have is the Backlot Tour - that, in itself, is worth the
admission.