OKC is forcing 5 more tos a game then those celtics did and way more versatile defensively. They don't have to rely on drop coverage like the Celtics did for Al and Rob Will to be contributors. Chet when healthy can handle smaller perimeter players while OKCs forwards/guards can reliably switch on bigger players without giving up too much of an advantage (watching J Dub handle Kat in the post was wild, he's giving up 7 inches and 40 lbs in that matchup

).
That fake ass drop coverage was the biggest reason why Steph basically one man army'd their shyt in the Finals

.