That panel beautifully details both the similarity and the gap between Zoro and Cook.
Similar, in the sense that they remain Luffy's most capable men.
Gap, in the sense that Cook's attack on Queen only drew blood a little, but Zoro's attack on King immediately causes a moderate amount of blood to spray from King's neck, highlighting the gap between their combat proficiency.
I commend King for surviving Onigiri to his neck, despite the spraying of the blood. I now dream of Luffy and Kaido having a CoC clash at the same time Zoro and King having a CoC clash. That would rock the world.