I think it's going to be more of question of finesse tbh.
Both Kaido and Shanks can use CoC for instance but Shanks is clearly potrayed as superior in that even though both can use ACoC so whatever Gaban thought them could potentially be tied to that as Luffy has to catch up to Shanks in that aspect.
Both Kaido and Shanks can use CoC for instance but Shanks is clearly potrayed as superior in that even though both can use ACoC so whatever Gaban thought them could potentially be tied to that as Luffy has to catch up to Shanks in that aspect.
