In looking at the stats, I think there is an additional factor to be considered, 357 Sig _should_ have a huge advantage because there are not a lot of untrained civilians using it. If someone buys a 357 Sig, I venture to guess that person is an experienced shooter and shoots regularly v. the majority of 9X19 carriers who only have that 1 weapon and maybe make it to the range once a year.

Assuming I am correct, the fact that the 357 Sig is not a lot more effective than the stats show would seem to indicate that its advantages as a round are not that great. in comparison to the 9X19. A better round with better shooters should be massively better, not marginally better.

*No studies to back this up, just pure speculation on my part, but it makes sense to me (but hey, I'm the one making it up, so of course it makes sense to me )