Asura is retconned Adv CoC until proven wise.
Where did you see this?
Even vc didn't say it has coc or it is a coc attack
Anyone who uses adcoc has :
1. Haki trails leaking from their weapons/arms
2.Thick haki sparks/lightning when they perform their attacks
Now where did zoro blades have haki zigzag trail or leaking from his blades? Or when he attacked kaido?
When someone uses basic CoC :
1. CoC burst
2. Thick sparks when they attack
3. If people are around, they'd feel it or fall unconscious.
Whenever CoC is used, we get clear comments and visuals
Oda showed us Yamato used basic coc and adcoc clearly on panels with visuals in this chaptee