Well I would say that as the velocity of .40 cal decreases the strike power increases so if it hits the cheek at only 400 to 500 ft per second its going to expend all its energy right there and kill you dead.
A .22 at high speed deflects off a glancing blow so to speak. I am curious to see what the ballistics show.
"Strike power" is not a valid ballistic term. There have been some excellent recent articles exploding the "strike power" or "knockdown power" myth of the .45 ACP. As long ago as the 1940s, Fairbairn and Sykes were debunking the supposed knockdown capacities of the .455 Webley - they tell a story about a Sikh policeman in Singapore who attempted to apprehend a malefactor, emptied the Webley at him, hit him 3 times and he kept on running, he wound up fracturing his skull with the butt of the pistol (finally! a practical use for a Webley!)
Not saying I would stand and take a shot from a .455, .45, OR a .40 (I was shot once with a .22 short by an idiot kid. Didn't penetrate. I am sure a Stinger would be a different story, but thankfully they had not yet been invented.) But the .40 S&W is essentially a cut-down and downloaded 10mm for people who can't handle the recoil of the 10.
What I DON'T want to be shot with is a 5.56/.223. That will flat tear somebody up.