Katakuri's portrayal isn't exclusive to himself but to those at the top of the Yonkou heavy hitter bracket. It's not anymore to Katakuri than the Sweet Generals' portrayal are exclusive to themselves and not Yonkou heavy hitters when Cracker was ragdolling base Luffy. Luffy fought Katakuri that arc the same reason he fought Cracker, they were stepping stones. Yeah, King and Queen are in the "same" league but so are Katakuri and Cracker. King and Katakuri are more special for being at the top.
Nothing highlighted King from Queen so far. He doesn't show any superiority above Queen, he is always put next to Queen and if he gets hyped it's in the same sentence with Queen, he doesn't seem to have CoC, haven't showed any adv haki so far.
Kings portrayal is nothing like Katakuri's.
If Oda wanted to separate King and Queen, he wouldn't place them everytime next to each other and he would have given Queen a lower bounty, but he didn't and put Queen in the same pot as Marco and King.