Sanji said it's hard to fight both, Marco says more than once he can't fight "
THEM" anymore, Sanji was the one who made Queen pull Hybrid, both King and Queen mention Marco in this chapter similarly like they were the ones who knocked Marco out, everything King did until now he had Queen alongside with him, even his first hit at Marco was due to the fact that Marco was focusing on Queen.
Thats all not for the sake of a clown came to say King is incomparable to Queen based on nothing, to SOMEHOW downplay Sanji obviously, and now cuz Zoro is fighting Calamities (they think it's a 1vs1 against King) thats the whole agenda