I hate these videos. This is a great example of why.
The time to first hit has nothing to do with the gun, it is all shooter. The follow on shots fall in just about the same spot. He missed high and right, that wasn't the gun's fault. As far as stopping with one shot- you're dealing with pistols- no matter what caliber it is going to be poor at that task. (Though I have seen them rank the same caliber differently from time to time, and I have no idea why).