You didn’t take L if kaido say no one can defeat him in the world when you have losing record like 7 defeat and 18 capture. It is his ego of villain type.
I think it is like shanks vs kaido , king vs Ben, red hair pirates fight beast pirates. Jack bring his army on zou. Red hairs pirates finish faster and able to reach marineford . That is your speed feat
I think Shanks displaying his Haoshoku could put us in a dilemma. If it says that Shanks' Haoshoku coating is much more advanced. Since, while it is a more advanced usage, it is still the same ability of coating. What would you consider another level of Haoshoku? Shanks would need to create weapons and constructs out of Haoshoku instead of coating his body and blade in it.
Do you think Zoro may beat Mihawk in Elbaf/Lodestar? I noticed that you think current Luffy would beat Mihawk, so Zoro shouldn’t be too far off either. I think it will be Luffy vs Shanks and Zoro vs Mihawk in Elbaf