Based on balanced and the portrayal based on Kaido and Big mom, it would make sense that Katakuri is stronger then Kaidos calamities as King or Queen. I can´t imagine that Kaido having two characters or even three who are equal or even stronger then Big moms strongest commander who strenght is easily more above Smoothies, Big mom YC2 lvl character.
Based on portrayal and if Ace beeing Kaido son I can see him above Katakuri because probably also facing Luffy as next step and enemy.
The other two as King and Queen, they should be under Katakuri lvl based on the equal lvl of each Yonkou crew. If im wrong I wouldn´t be surprise though, it wouldn´t be the firsttime when Oda making something different and don´t hold in the previous stuff.