I encounter superblack on some of the really big spacebar before. I got one recently from one with a 10 units space, also using Cherry thickass caps, so it needed it I guess lol.
Hmn, I didn't think these looked any different than usual DCS. Maybe they used some different sources for other keyboards. I have seen others with few different switch type so it is highly likely they used different oem at different times maybe even with MX ones.