Measurements are not a sign of total equality, they're just a good engineering base to the product. Not because of magic or anything, but simply because of the limited data we can extract from these measurements. Just a banal example - if we have two girls and they both measure: Height 165 cm, weight 55 kg, hips 90 cm, waist 60 cm, bust 90 cm... what can you get from that? Even if you get much more detailed and include distance between the eyes, shoulders, arms, legs.... There's a lot of good and valuable info there for sure, but at what point do we say - OK, these two girls measures the same so they must be equally pretty.
Measurements are great and useful tool but shouldn't be mistaken for definite description because they're not. And nope I'm not a superman with super hearing, I'm actually an engineer too, majored in precise measurements (not related to Audio though but lab equipment) and that's why I know how difficult is to choose a meaningful set of measurements, conduct them in a correct way and in a meaningful environment... and last but not least understand them properly and give a meaning to them.