There's supposed to be more dark ride elements added to the proposed attraction than just the film, meaning if the Florida version used the Hollywood film, it would still be unique enough. I would be willing to bet that it uses the same film as Hollywood. That would explain the idea to go out of their way to theme it around Skull Island rather than an existing Universal area which would contradict the Hollywood theme. It would also be a good cost-cutting measure in what is apparently a hugely-expensive attraction.