A single proof of King being considerably stronger?
They did similar against Marco, feats wise they're there, their portrayal also similar, with Marco saying that they're both 1+ bilion pirates, they were presented together and both are feared by Jack.
I dunno why you people don't consider bickering as a proof, do you think that you can have the luxury to bickering with someone that can defeat you without any problem? Do you see someone like Cracker bickering with Katakuri? Of course not, if King would have been way stronger than Queen then the Cyborg Dino would have respected and feared him just like Jack.