I think it really boils down to placemaking and submersion to various degrees
See: The intentional differences between DC at Six Flags and Marvel at Universal (and yes, Disney)
There is an intentionality with story and a sense of place with one and the other is merely a light aesthetic applied
This would actually be an interesting thread I feel if someone wanted to start it
Also Epic Universe will combine so many lessons Universal has learned about theme, immersion, and story over the last 30 years, exciting