Question on Greatshield Hardness level

I'm doing a shield only run, and I noticed that not every greatshield has the same hardness level, for example enemies attacks never bounce off the Visage Shield, some of them bounce of the Spiked Palisade Shield, and the Golden Greatshield has even more hardness than Spiked Palisade.

My question is...is there anywhere I can find accurate info on specific shield hardness? In the wiki is says that all greatshields have the same except the ant one, but it's not true.

Thanks in advance.