Reality is, you can watch a bajillion actual defense and police shootings on Youtube (Active Self Protection) and other places on the Interweb, and the 9mm seems to take a mag and a half from several guns to neutralize the typical street hoodlum—can’t recall seeing one, one shot stop in any of the vids I’ve watched!
What I can relate to, is hunting performance with .45 caliber pistols, and early .38/ .357 pistols, and on medium to large, deer sized game, and livestock ( barnyard critters like sheep and goats, to horses), and I’ve never seen a 9mm, 38 Spec, .357 load that would compare to even mild .44 Spec, or .45 ACP?!