honestly it all depends on the team. if the team has the capable scorer than no doubt you take KG. the discrepancy between KG & dirk's defense is much greater han their O. kg's defense was just nasty. KG still gave you 22-24pts, but he would give you top 3 defense. KG was long as hell with the speed and stamina to play every damn minutes. and dat intensity yo.
but if the team is offensively challenged, then i can dirk being preferred.
Thing is Dirk has taken his team to the playoffs playing 1v5 with a full retirement squad after Cuban cracked the core after the chip. Then if he was healthy last year he'd have taken that team to the playoffs. And that team was featuring grandpa Kaman, OJ Mayo(who may now be JR Smith with a better personality) and some other stuff. He made everyone look so good that teams would want to give the (usually without Dirk)Bi-Annual level guys a Full MLE if they weren't 35 already.
Dirk's career numbers are simply better.
But I agree that KG is a valuable and strong 2 way player. He may be the Big Man version of Paul George of the last 1 and a half decade. He's just not in that LeBron, Duncan, Durant, Dirk and Kobe stratosphere. And I feel like that's where that wolf dude is setting the threshold for superstar.