Wouldv've expected GP's scoring average to be lower than that tbh, especially because of his last years.
CP0 overated, but let's not forget GP was on those Sonics squads that got bounced in the first round. So there's that too. I'll go with Payton if I mostly need someone who controls the pace, plays great defense and can score (including posting-up, usefull in the playoffs), with CP0 if I need more of a scoring PG. But I guess a lot of depends on who is my number one guy, because I don't think you can win with either as your first option.