We have Paul Harrell for that.
>The idea is that the differences within those groups are quite small, at least on human beings
But that idea is simply wrong. After all, we could look at that case when a police officer emptied his .357 Magnum into some big guy who replied with a single shot .22lr pistol. In the end the police officer died when that single projectile penetrated his heart, and the guy survived the ordeal. We can conclude whatever we want based on that single case, but that doesn't change the ballistics of 9mm Parabellum and .357 Magnum. I'd say the reason someone would choose one over the other comes down to three factors:
>the shooter's ability to control the pistol
>the kind of pistol being used
>the kind of situation you expect
If you fear that some methhead will try to smash your head with a rusty pipe, and you can handle the recoil of .357 Magnum and be calm enough to aim your shots well, then a snubnose revolver could work just fine. If you are expecting a long firefight where a revolver is just too slow to reload, then you should carry at least a self-loading rifle.