Disneyland.
F! runs twice daily. (On days it runs). This makes a big difference for crowdiness.
Better story.
Better effects.
Better upkeep.
And especially, F! was designed for DL, for the Rivers of America. F! is infinitely more magical when played out within the park itself. The way fireworks are infinitely better when they explode above a castle instead of above a random parking lot. Yes, same fireworks, better seating, but the entire point is lost.
Oh, and no six thousand Brazilians screaming chants! (If suddenly a few thousand Brits would shout football stadium chants at each other for hours on end, I'm sure they'd be asked to please refrain from such activity or else be politely escorted out...)