I go by what a pedal sounds like not charts & graph printouts.
Call me old fashioned i guess.
Do people still listen to pedals or is it what color the paint is now ?
The differences are more just the tolerance drifts in components from pedal to pedal than anything else. And comparing a new pedal to a vintage has an even bigger tolerance drift from the components ageing. So no 2 pedals are exactly alike no mater how you look at it.