Personally I could care less about the Disney VS UOR or Potter VS Star Wars Stories. That's all just opinion anyway.
UOR obviously has a HUGE head start when it comes to the amount of Potter experiences vs Star Wars experiences.
That being said, I've already experienced the Potter rides, and more doesn't excite me nearly as much as what Disney is planning.
My main worry is that SWL will be another Pandora, with insane queues due to low capacity, but highly popular attractions. If I have to wait 3 hours to ride anything in SWL, I won't be happy.