I’ll give you passer. They have the exact same FG%, so no Williams is not better around the rim.
Has Williams ever even attempted a mid range? TJD has hit 5 or 6 this year, so no to your jump shooter theory too.
They average the same number of boards per game, so that theory is gone too.
TJD is definitely more athletic. You also fail to mention TJD is a far better free throw shooter. As has already been mentioned, the biggest difference between them is that TJD is a very good defender and Williams... well... isn’t.
When there are 3 centers on the All Big Ten first team and Williams isn’t one of them, you will have your answer.