It is however unclear whether this improved consistency with a higher retail price is the result of better headphones or better repeatability of measurements wi

It is however unclear whether this improved consistency with a higher retail price is the result of better headphones or better repeatability of measurements with more expensive models. Isn't consistency an important characteristic of a headphone? Perhaps even more important than some ideal frequency response. You want the same sound every time you listen to a song, you don't want it to vary.