A lot of people find what I'm about to say really annoying, because it's hard to quantify, but man.
I love bringing up stats, but there's an intangible trait that players have that just completely dwarfs any stats you can point out: Performance when things are tense, when the moment is big and the other team is rallying. Jimmy Butler turns into a 10/10 superstar in those scenarios. Jalen Brunson is a superstar in those scenarios.
I think the previous era's Jazz had a lot of guys that turn into total duds in those moments.