Depends how much you value the WSS title.
In my opinion Mihawk's portrayal is paradoxically greater than Kaido's for a few reasons;
- IS his title, rather than being SAID to be.
- it features in the databooks which is decidedly a plus
- Zoro displayed to be most likely capable to give Kaido a run for his money if healthy, and that's thanks to his defensive and offensive outputs and yet he should logically most likely still stand rather below, possibly quite below, Mihawk. Kaido might be stronger than what he displayed so far, but if he truly has got to be defeated this arc, and it seems extremely likely, he might have gone all out / almost.