It's cool that he completely dissected the tubes to their smallest components and did all that measuring...
...but honestly, what was the point of even comparing them?
I mean....the ONLY thing the two tubes have in common is the name and the tube type.
I could see if New Sensor went to the trouble to do what he did, and then tried to recreate the original Mullard down to each and every component and measurement...
...but all they did was slap the "Mullard" name on tubes they were already making.
He might as well compare the original Mullard to just about any other brand...it would be the same outcome.