knowing that shanks was wanted at close to a bil 12 years ago should tell you the level mihawk was around 12 yrs ago . Bias is when you assume one grew and the other failed to because one became a yonko. you have a classic example in kidd and law, individually perceived by the world government as equal threats to luffy while not being crowned emperors.
zoro defeated a pirate wanted above that amount and as far as the question goes
by the looks of it evidently not
mihawk in cross guild now so I also doubt the shiryu speculation throws any wrench into this. happy to know this fight is mist likely still happening