The design at Potters is not as good as Carsland looks to be, but the rides are more fun. Potter and butterbeer for me.
When the Wizarding world opened it was claimed by some that the theming was just as good as in DisneySEA. That is not true at all. DisneySEA would never have the ridebuilding unthemed and visible from the park like it does in the new Harry Potter ride in Orlando. Buuh!