Thats a tough one, because they bring different things to the floor.
I think KG edges out just a hair. He's the anchor on D, and emotional leader on and off the floor. He's a great teacher and keeps the young guns confident if they deserve it.
PP had been slitly above KG the last few years because of his clutch game, being able to win games in the 4th. But last year he just didn't have it like he did in the past.
This years play offs when KG got to play a full game he really stepped up his game, I mean he was pulling 15-18 boards a game, and thats huge on this team. PP was averaging 5 turn over a game, for a potential 10 to 15 points for the other team. That was the difference in most games. His shot is flat 90% of the time, and just can't handle like he use to.
Right now for this team I think KG is more important. Reason is if we are trading PP to bring in either Smith or Cousins on some kind of miracle trade, KG would be huge for either one of them in the learning and playing. Green has had his time with PP, and now is ready to be freed to see if anything has stuck.
Now if PP can get his clutch shooting back constantly with out the bad turn overs, then its going to be a new discussion...