How different are these 2 stats? Will PF VPIP always be lower because its not counting postflop actions, where usually people are betting/calling/raising? (wait, wtf is PF? preflop or postflop?)
Or is it possible for PF VPIP to even be higher than TOT VPIP, for example a fish is a preflop raising/3betting monkey but then has no aggression and likes to fold postflop