Here are top and bottom photos showing the difference between this (Vortex PBT), the Vortex Doubleshot PBT, and a key from the Pok3r. I used a few sheets of paper to raise the Vortex PBT keycap in the first photo because Cherry profile is shorter than OEM, so that you can see the thickness without distance distortion.
Ashamed to say that I do have the backlit PBT, actually. I should have taken a photo of that for a complete family portrait. They look identical to the Doubleshot PBT to my eye. I'll take a photo of all 4, but not today - spent way too much time on this already :)