I have been using the N6ii ti for comparison, and the W2 this weekend.
Tips wise, currently I use the JVC Dots++, I might switch back to the Azla Crystal.
Also yes, I am using the shielded version, it is possible it sounds different than the normal version, I cannot say.
If I take a song like:
Billie Bossa Nova
With the FT, the voice will be slightly warmer, intimate, more emphasis on the bass.
With the Centurion, there will be more focus on some of the instruments you can hear on the side. It "claps" more.
I don't feel I get more details with the FT (compared to Centurion) however it gives a more analog sound.
I do not prefer one to another, and that's the problem to me, I don't know what to feel when comparing both