There's a big diffrence between these two programs.

PT with GT or PA HUD only work off of your own data (that you could of observed on your own)

Prophecy works off of someone else's data. The idea is you sit down at a SnG or a Ring Game and it can already determine what sort of players you are dealing with (it must be observing all the tables somehow to collect information on everyone). That's pretty much cheating since it's not info that obtained on your own...