Different management. Different designers. Different market.
Hollywood is a far more secular audience than Central Florida, and is also in direct competition with more haunts (Knott's, Queen Mary, 13th Gate, House of Horrors... just...
look). Softening anything in Hollywood means a loss of market share. They've had nude mannequins and no one batted an eye. That's something Orlando has never done. And Orlando doesn't HAVE to do it. Universal isn't in direct competition with anyone in Central Florida.
I cannot reiterate enough how different and disconnected the two coasts are in how they do everything.