Yup, bought the red separately and it's much brighter than the one that came with my M100. But the one that was included has that little extra dongle for another set. Just wanted an clean red cable.
FYI, the red cable included in shadow is a darker shade then the one bought separately. It is very hard to tell just by the pictures, but I know this as I have both. I am not sure why V-moda did this, as I do think that the straight cable's red is a closer match to the shade of red on the shadow.
p.s. did you buy that red cable separately? I just look at your pic and that is the same shade of red from my straight cable but not the one with my shadow.