I've been blessed enough to be able to do both. For me, it's really hard to compare. I can't say one is better than the other. I loved getting to get up close to some of the props and sets on the tour like Tom Riddle's grave, the entrance to Chamber of Secrets, Hogwarts Gates, The Great Hall, The Hogwarts Bridge (which you actually get to walk on), Diagon Alley set (Yes, they rebuilt it inside the tour. I actually prefer Diagon Alley at USF to the real set), Godric's Hollow (Complete with the hole Hermoine blasted so they could escape), the life-size Hogwarts model used in all the films, plus lots lots more. I found getting to do both actually enhanced my appreciation for all the work done on the films and for the work done in Universal Studios.