It is headcannon based on the portrayal of both characters, Zoro proved his strenght already soo if King give shim trouble that just shows how strong King is.
Queen, well, that will depend on what kind of atacks he uses in his fight against Sanji and how well he can tank his kicks, while he was trown around in this chapter i dont think he got that much damage from it.
Perospero got yeeted by Queen but that also dont mean he is KOed.