Are his defenses (wings) not straight up above Kaido's (scales)? One tanked an attack like nothing while other was cleaved through.
I mean, it's practically a fact. You have to be an autist to deny that. The only difference is King's Armor are his wings while Kaido has full body scales barring face lol
King is on FULL GUARD and his wings act as swords the way he uses them, presumably with CoA.
Kaido took lots of G4 ryuo enhanced attacks and shrugged it off with mild internal damage only, King can't do that; King get's washed badly by that level of attack.
Zoro's tatsumaki grazed Kaido in one spot that instantly regenerated (after unleashing Enma properly), and Kaido was distracted trying to swallow Luffy, not on full guard with his wings in cross block fashion with CoA and flames used to mitigate the damage.