I've been pretty happy with PT4. The only issue I have with it is that I can't get it to track tourney results correctly without my having to manually input the info. Also, any PO tourney I play, it thinks I bought in for the total prize amount (which seriously hurts my ROI if I don't fix it). I haven't spent alot of time trying to fix it, and maybe there's a simple solution. The cash games are tracked properly.

I can't speak for Holdem Tracker.