Oh there is a difference.
In Gold’s gym, guys who can do that do it once. The Neantherdal had to do that all day long, because when they went hunting for mastadon or had to fight predators, those weren’t short battles.
Also, you are talking about an average, not 1 in a thousand. If we were talking about their 1 in a thousand, we’d be talking about our 1 in a million.
Oh, I agree they are larger than average, but a larger-than-average Homo Sapien Sapien would be a near equivalent.
Seriously, in my gym, I am one of 20 or 30 guys who do a 405 for reps -— just takes training and eating.
Now, north of that, it becomes a drug or freak genetic thing -— or that’s my excuse for stalling at barely above 405.