How much would Kessler cost?
$20mil per season?
$25mil per?
I don't think he gets as high as $30mil. I don't think there will be enough competition for his services to get there. Lack of offensive game. Not a high end athlete for the rim roller / alley oop plays that separate great rim finishers from good rim finishers.
Hartenstein is getting $30M/year. I expect Kessler to get between $30-35M/year once his rookie deal is up.
Hartenstein has more offense. He is a very good passer. You can run your offense through him in the high post like you could with Joakim Noah. Kessler cannot do that. He is a limited passer. Hartenstein also has that floater that makes him more effective in space. Kessler doesn't have that. Kessler is just a rim finisher.
Passing statsHartenstein = 3.7apg to 1.7 turnovers
Kessler = 1.7apg to 1.5 turnovers
Shooting statsKessler = 197-256 FGA at rim finishes, 75-126 within 10 feet, 0-3 from 10-23 feet, 1-17 3PTA
Hartenstein = 164-222 FGA rim finishes, 117-216 within 10 feet, 74-145 10-15 feet, 0-2 15-23 feet, 0-18 3PTA
You can see there the difference in volume in shots 3-10 feet with Hardenstein having almost double the number of attempts. And then the huge difference in shots 10-15 feet. Kessler a complete non-threat whereas Hartenstein is still a scoring threat out to 15 feet.
Hartenstein is levels above Kessler as an offensive weapon and consequently as an overall player.