With this kind of repel CoC clash, it always starts with the weapons not even touching, two advCoC users:
Over here, they clash weapons, King is bringing a lot of force trying to send Zoro into the ground. If King doesn't have CoC..
My take is that Zoro is the one with such a high level of advanced CoC that he can use his simple CoC blast, as a repel/defense mechanism.
We've seen this happen one other time with Big Mom.
And maybe Shanks when his CoC blast cracked WB ship.