This does not necessarily answer the question but: headphones, including good expensive headphones colour the sound. That's good, that's on purpose, and that's part of their selling point. I have the Sony wh1000xm3 and I love them. Lovely warm sound, the bass guitar in songs can be heard very clearly, though maybe a bit at the expenses of the drum sometimes, and it can get boomy.
Now, when I play instruments - mainly the bass - I do not want any of that. I want headphones to give me a flat response, with minimal to no alteration of frequencies. Sames as a sound engineer would do. The sound is already coloured by amps and pedals that are designed to enhance my instrument specifically. If I go through headphones that alter the sound, I end up making choices in terms of amps/pedals settings in response to that, which I guess would not give me the sound I have in mind in other contexts.
So in that sense I do nof find the expensive sony to be good. And I find some cheaper ArsTechnica I have to be better.
So, flat response, clarity and detail even at high volumes would be my idea of headphones for a musician.
I can imagine somebody triying to make headphones to make the guitar sound "better" but what's the advantage of that? Headphones are meant for practice and learning about tone. And how do you define "better" anyway?