I use Poker Copilot 2 as well. I have tried the Pokertracker 3 on Mac. PT3 has more stats and you can tweak it more than Poker Copilot.
For me, Poker Copilot is enough. It's clean, fast, not so clunky, not heavy as PT3.
It gets updated regularly unlike PT3 so... That's just my 0.02c