Are we sure that Koby is using Adv CoC?
Because that doesn't seem the case, given this which we 100% know being no Adv CoC
As seen with Luffy, Zoro, and Shanks, people should faint with Adv CoC as it involves CoC, why no one faints here?
Yeah Garp's punch is the same in visuals, but Garp too may have used "only" powerful Armament Haki in this move, and Adv CoC in Blue Hole for instance
Dunno, it's confusing