For the study the bottom half of Table 2 seems to be the most telling aspect.
Quite certain larger calibers are more potent but agree with above posts that OIS data is a better way to compare (even better still with things like CCW shootings, medium game hunting, etc. which are even less likely to have a "mag dump")
We all already know multiple rounds and rounds actually hitting head, neck, chest are more likely to be fatal. Tiny pistols, which are still less likely to work for several rounds or to get several accurate hits even when working - are acting as longer reach shanks...more or less. Knife wounds often more impressive/gruesome.
Since the beginning of bullets - more momentum = better at tracking straight, especially with bone contact involved, with more mojo to reach spine, heart, brain from multiple angles. The primary benefit of a larger caliber isn't the diameter.