As far as I understood, pro/non-pro only means the clock/memory frequenzy.
So, having a 9500non-pro clocked higher than stock clock 9600pro would make the 9500 faster.
That's how I understand it

Why 9600 costs more? Well, guess it has higher board number 9500->9600 so people think it's faster, thus, more money can be claimed from it

-M