Barrel length and placement matters, but this might help. Also, there may be some difference in how soon one stops with xyz, but it's hard to quantify, and one will never know, unless they have an event.........
I do feel ammo matters - a good bit.....as well as placement.
If you think ANY handgun cartridge gives you a 90% chance of stopping someone in one round, you're going to be in a world of hurt if you find yourself in a gun fight.
No major LE agency in the world takes Evan marshals methodology seriously. In my opinion it's a highly flawed methodology.