That diagram in mind, still 90% of lethality is placement of the shot with most sub.45 calibers.
With a 45 you have more discrimination available to you, that's all.
Talked to a cop who had been an MP in Saigon and a cop in Baltimore before he retired. He had seen first hand what a 9mm can do and a 45.
He had seen men walk away from several rounds in the torso from a 9mm, but never ever from a 45.
Now maybe you are a cool, accurate shooter if a big dude is coming at you with a big knife and can do that head shot with ease.
I would prefer to leave less to chance and aim center body. For that I want a 45.
Note also, that full metal jacket 9mm is the SUCK. No one even bothers to defend it any more. It goes straight through. FMJ 45 do not nearly so much, and you don't always have a choice about what ammo you have available, so with the 9mm you may wind up carrying FMJ instead of the better HP ammo in a bad situation, simply because logistics is not an easy thing and you often have to shoot what is available, not what you prefer.
45 FMJ rounds beat 9mm FMJ rounds hands down no contest. So why take that risk you could be only given FMJ in a bad situation and be stuck with that 9mm FMJ shyte?