King dropped and decapitated Raid Suit Sanji in a low or neg diff effort and since you brought that topic up here is why its a neg diff fight.
Not to mention King couldn’t overpower Sanji with a kick while Katakuri’s kicks match Snake Man’s attacks. So literally King’s biggest weaknesses is his sheer lack of speed against a speed demon like Katakuri, but Katakuri still has better AP than King anyway lol.