King and Queen got portrayed as comparable through out this whole arc.
They are contrasted with Jack as overwhelmingly superior to him.
They are judged by Zoro to be opponents of similar difficulty in terms of getting through either of them to reach the roof.
They are described by Marco in the same breath as difficult opponents to hold on against
In no world King is anything but slightly stronger than Queen.
Anyone going King >> X >>>>Y >>>Z >>>> Queen now that is clear Sanji is fighting Queen has an obvious agenda