[billswift]

Slight nit. >but because their arms didn’t tire as quickly from operating the flight controls

While tiring would be a factor, even if completely fresh, you can simply move a lesser weight (force) faster than a larger one.

Second problem is that there were multiple differences between MiGs and Sabres - the one I always heard was most significant, back when I was a teen, is that Sabres were better constructed, MiGs were more likely to fall apart from relatively light damage. So don't take any single article or viewpoint as the truth - reality is always more complex than will fit into a article or book.

[Symmetry]

Another important difference that went along with Boyd's thesis is that the Sabres had less obstructed canopies, letting the pilot see around themselves more easily.