Looks like I'm almost certainly keeping the Razer.
It wins in virtually every category, barring pure aesthetics, I like the Logi RGB a tad more and I love the "G" illuminated in the top left. and the Logitech has a caps lock light, while the Razer "caps" key turns white when CAPS LOCK is on.
Razer wins on, Cable, cable placement, key caps (PBT), sound, actuation, a solid click down, whereas the Logitech, has kind of "double action" where it clicks first then actuates, if that makes any sense, pure gaming Razer wins easily, the press and noise experience is far better. It feels a little bit lighter to. I do like the Logitech though, but it has to go back.
Scores on limited testing:
Razer - 8.5
Logitech - 6.