Quoted from jeffgoldstein2:Premium flow is much better. I wouldnt go any other way unless budget is an issue.
I played both side by side at this weekend's Portland arcade expo. I agree completely that the premium with the diverter ramp really made it much more enjoyable to shoot the left orbit (or non-orbit for the pro). Looping that over and over felt great. It is unfortunate that is something you have pay extra for.