I thought I would resurrect this thread after visiting Universal Orlando for the first time today.
My thoughts are:
Universal Hollywood > DHS > Universal Orlando
USH has the whole REAL movie studio thing going for it. The backlot tour and stunt shows were the highlights of my day at USH. In fact, the fact that it is a real movie studio is why it tops my chart.
DHS seemed to have much stronger theming and immersiveness than USO did. There are parts of USH that are not themed at all (I'm looking at you, "World Expo") or feature jarring theming (the exterior of Transformers doesn't blend into neither the NYC area nor the San Francisco area. Yet other parts - New York and Diagon Alley definitely give Disney a run for their money. USO is WAY TOO heavy on the 3D / motion simulator rides. I found myself craving a dark ride with immersive sets. And while Gringotts and MIB were amazing, the only ride that seemed to have truly have that spirit was ET. And gosh, that Hollywood Rip Ride Rockit rollercoaster, well, I didn't enjoy it at all, and it also weakens the New York theming.
Despite the weakness of Hollywood Studios in its current state, I think that in the broader context of what it was and where it is going, it has a much stronger overall theme with a broader array of attraction types.