From the eye test Booker has looked amazing so far. But so far this year his on/off variance is zero. Basically the team is doing same with him on the court versus him off the court.

KD is a plus 19 per 100 possessions so far this year. Basically the team is ridiculously better with him on the court. Basically 19 points per game better.

Oddly the Net Rating with both KD and Book on the court is only +1.9

Good news is Book only played 3 games, so too small sample