Rustpot
M Frame Lover
I believe I have one. From the OakleyUK clearance a little while back - one was advertised, I bought it, and it's definitely a lot more reflective than any of my other VR28 examples.You are (again!) correct, as I can find no documentation to support VR28Bi offered on an M Frame.
It must be different lighting or camera angles, as some VR28 lenses look darker than others.
Can't find my VR50 at the moment, or I'd pull that out, too.