Is it corrosion and verdigris damaged or is it cast?

[John B20]

I would like help in deciding whether the damage to this coin's surface in corrosion and verdigris or is the surface roughness due to it being a casting.  Thank you in advance for your opinions.  I have posted pictures of the coin with and without green tarnish and a comparison of the coin's surface with a badly pitted greek bronze coin.  They look the same to me.  What differences do you see?

[archivum]

Probably cast; there's a mushiness here that looks ingrained not wear-induced.

[John B20]

The badly corroded bronze coin has a mushy surface like to silver one.  The holes in both are also very irregularly shaped, unlike trapped air bubbles.

[djmacdo]

A cast.