You’ll notice that the shooter in the ‘dual pistol’ case extends and retracts whatever arm is up on line. Of course this takes a lot of time. In the single shooter’s case I bet the extension was always the same. I’d like to see a test of both arms extended against a single shooter in that case.
“I’d like to see a test of both arms extended against a single shooter in that case.”
To so that you have to be firing both eyes open and with the weapon(s) not in line with the eye. Otherwise they get so close together you can scrap up your hand with the opposite side pistol recoil.
Firing two at once as fast as one can be done, I think, but would take a LOT od dedicated practice. You have to be able to point shoot with either hand out of line of your head.
And even if you COULD do that, you lose your speed advantage as soon as you have to reload.