Tough call. I've got pinball money set aside and it's hard to say. I played the SW Premium yesterday and it was impressive! I haven't played the pro, but will get to play it next weekend. My gut is that I would want the wireforms and loop of the Premium on a Star Wars.
I played AS Pro and Premium at TPF in the Spring. AS is sweet, but I would prefer the pro. Better players than I have told me that the AS Premium is worth the extra as the mini PF makes it easier to complete the modes etc.
If it were dead even, I would go AS pro as best bang for the buck. But it's not even, It's Star Wars! I'll have to think about it before I leap.