Unfortunately, I can be of no real "first hand" help. I have not fired either round. Therefore I have no concrete evidence. Normally, if I don't have a meaningful contribution, I don't join a thread. However, it's Sunday. I shot a match yesterday and today .... I'm Bored. So,
here I am ..... Perky. Sort of.
I can tell you however, based on several hundred rounds fired (hundred thousand, that is), a heavier bullet at higher velocity will yield more felt recoil than a lighter bullet at lower velocity. It's simple physics after all. Equal and opposite reaction and all that. Specific case capacity has nada to do with it.
Coffinmaker