Well, There is essentially 0 differences between the TP1 and the TP2 other than the case and the display. They have exactly the same hardware as far as I know. So, the gps chip is also identical in each phone. With that being said, there is quite a few differences just in the rom that the TP2 gets when compared to the TP1.
Heres straight from HTC's site:
The Touch Pro:
http://www.htc.com/us/product/touchp...ification.html
Touch Pro 2:
http://www.htc.com/us/product/touchp...ification.html