Katakuri's portrayal was being the top guy of a Yonkou crew on top of having FS and being Luffy's final stepping stone for the Yonkou themselves. If Oda ever writes King and Katakuri scuffling, I guarantee neither would have an easy time with each other.
Oda wrote it out plainly, he had Kata consistently be called “The billion berry man” “A man worth a billion berries” and variations like it, cut to Wano we have Marco a long time commander of the strongest crew in recent memory Looking at King and Queen and calling them pirates powerful enough to be “worth more than a Billion” that one quote ended it right there a direct comparison between Katakuri and two characters Oda had explicitly called worth more than him.