Come no one would die. All that matter is whether they have coc or not. You think right after figuring out what adv coc is luffy became someone of kaido caliber? ... coc clash only happens when weapons don't touch they split skies. No one is going to do die here. Later it's more or less about your haki level which we don't know who has it better till now. As a swordsman and as a fist fighter haki usage is completely different.