The 8 ton punch won't kill the other fighter. It's like in real life, boxers have different punch strengths. Mike Tyson punch PSI was about 1,800. Pro MMA fighters throw a 1500-1600 psi punch. With Quinton Jackson throwing an 1,800 psi punch. Since they are in the same category as fighters, the punches will both do damage with a chance for a knock out. An average boxer has a 600-1200 psi punch and a normal unskilled human 300-600 psi.
The differences between the fighters is not much at equal levels, a drop off at lesser fighters and a huge chasm between top fighters and a normal man. If the other fighter is stronger the damage will hurt but both will hit equally hard. An 1,800 psi punch vs. a 1,200 punch isn't much with skilled fighters. One has a greater chance of a knock out but both can do the job. And this is what you are taking about.
The differences between the fighters is not much at equal levels, a drop off at lesser fighters and a huge chasm between top fighters and a normal man. If the other fighter is stronger the damage will hurt but both will hit equally hard. An 1,800 psi punch vs. a 1,200 punch isn't much with skilled fighters. One has a greater chance of a knock out but both can do the job. And this is what you are taking about.