Thompson is a 6ppg career scorer.
PJ will get you 15-22 ppg if given starter minutes while being a threat from downtown.
How do you know? The guy hasn't played in a single NBA game. He scored a decent amount of points in summer league, but he didn't shoot a high %. Granted, maybe the defense was keying on him in a way they won't in regular season games (because we'll have Al, Kemba, Lance, etc out there) but I've noticed that you have a tendency to make predictions and pawn them off as statistical facts.