Mostly, the differences have to do with real estate. The E.T. and Kongfrontation soundstages, which now house the California and Florida versions respectively, occupy different footprints. Orlando's larger width, depth, and height allow for a larger, longer ride. According to Mike Hightower, Universal's VP of project management, budget plays a factor as well. While he isn't specific, the implication is that Florida had more money poured into its attraction.
- Ride Length- One of the major differences is duration. Florida's Mummy clocks in at about three minutes, while Hollywood shaves 30 seconds off for about two-and-a-half minutes of fun.
- The Set-Up- In Florida, guests supposedly wander onto the movie set for the next 'Mummy" film sequel. Eventually, this morphs into the Mummy's tomb. In Hollywood, the line is shorter, and there's no pretense of a movie set. Guests there enter into the Mummy's tomb from the get-go.
- The Launch- In Florida, the vehicles launch 45 degrees up into the mouth of the Mummy. In Hollywood, it's a straight, zero-degree launch. Both versions reach top speeds of 45 mph, however.
- Going Backwards- In Florida, the vehicles go backwards early in the ride after encountering the scarabs. The backwards part of the ride only lasts a few seconds as a transition to the next scene. In Hollywood, passengers don't encounter the scarabs until halfway through the coaster part of the attraction. They continue the second half of the coaster ride facing backwards.
- The Turnaround- In Florida, the vehicles drop onto a turntable a few seconds after going backwards and immediately before they launch into the coaster part of the ride. In Hollywood, the vehicles proceed backwards for the second half of the coaster ride and the turntable faces them forwards to the exit area for unloading.
- Fire- In Florida, the Mummy unleashes a healthy blast of real fire. In Hollywood, the ride uses a "faux" effect to simulate fire.