At stock clockspeed the GF2 Pro offers about 99% of the performance of the GF2 Ti, so they are for all practical purposes nearly identical.
That said, I'd still go with the Gainward GF2 Ti @ $93 because it offers much better 2D visual quality then the PNY version, and Gainward's GF2 Ti has 4.5ns RAM and so it should be a nice overclocker.