The guy I trust by a country mile is Grant Williams. He makes the least mistakes (granted Kanter is just bad), is the best and most versatile individual defender, and can shoot.
It’s not at all about grant on KO or whoever because of all the screens and switches. It’s about the fact that grant can cover 1-5 on a single possession if switched and that he’s the best pick and roll defender period. These things are huge.
I’m on record over and over again stating how much I love grants game. I think both Williams will play but if it’s an either or thing, it’s grant all the way for me. He’s in the every game rotation in my book from here until as long as he’s a Celtic.