That is what I found when looking info about it as well. "DCD is single shot PBT dyesub."
But also: "Both (DCD and DCX) profiles are cylindrical, and both are sculpted. However, the exact contours and sculpting are not the same."
I see them both as Cherry profile, so lets say the only difference is DCD is PBT dyesub and DCX is doubleshot ABS
I'm actually not using mine, they're still sitting unused in the box as I have a separate BT numpad that is it's own thing with it's own style. If you'd like to find a safe way to conduct a transaction, I am willing to part with them. Some extra options for the +, 0, and Enter keys. I'd rather have them go to someone who desires them, than sitting in my closet, forever without a home. :(