Is Hybrid Kaido >> Base Kaido?

[SSJ2]

Given the nature of Zoans it seems likely that Kaido should be much stronger as a hybrid, but is this really the case? I'm thinking about the top tier of power right now, and Kaido's base form has given us no reason to believe that he is below Yonko level. He was seen fighting Big Mom evenly after all. If his hybrid form is dramatically above his Base level, this wouldn't make much sense.

 

[Future Warrior]

I think it’s a moderate boost in physical stats, and can use his zoan techniques like Boro breath.

 

[SSJ2]

It leaves me wondering where Shanks would fit among these guys. Both Kaido and Big Mom have ways to power up beyond their base, Shanks does not as far as we know. I really doubt he is substantially above Base Kaido/Big Mom but who knows.