I am not sure $600 a night cheaper is accurate, You can find deluxe hotels at Disney in the $400-$500 range$600 per night savings x 7 nights is enough of a savings for me. That premium is not worth it to my family for location, theming and transportation. Plus universal has that same great atmosphere that wdw hotels have, and some would argue better. When you then add that you get free express pass, it really tips it in favor of staying there over Disney.