Universal Studios Hollywood in California and Universal Studios in Orlando are vastly different. California has less rides, and generally lower waits. It really depends on what time of year you go.
It's called express in Orlando, but Front of the line or the (A) pass in Hollywood. It's more expensive in Hollywood because it has fewer rides. I've never gotten it in Hollywood, since last time I went was early May 2 years ago when it was slow so no front of the line was needed.
I did to the VIP experience in Hollywood once and that I'd recommend over the pass if you can afford it, which includes the front of the line pass, and I thought it was worth it since they back-doored you to all the rides, let you out in a few spots in the backlot (normal tour doesn't drop you off anywhere), and had an amazing tour group only lunch buffet included. After the tour was over you used the VIP badge as a FOTL pass if you missed anything, or wanted to re-ride.
If you've only been to Hollywood (or never been to Universal Orlando) they are incredibly different experiences so it's worth doing both. Orlando lacks a true backlot tour, but the rides are much bigger in scope.