I freely admit that I'm far from being an equipment expert. However I'm fully aware what VPS and Diamond Touch stands for and that it differs from the NCT stuff. NCT indeed is, as you mentioned, the acronym for Nano Composite Technology and it is certainly annoying that Stiga is so silent about it nowadays.
Before I returned to tt about 1,5 years ago I did quite some research on blades and rubbers. One of the blades I was briefly interested in was the Stiga Hybrid Wood NCT. Of course I didn't know what NCT meant back then and tried to get some information on it. I'm almost sure btw, that it was explained on the Stiga tt website back then (at least at some point), but for whatever reason they decided to remove the information. Anyway, to this day there are
some shops that give information on Stiga`s NCT blades and they are
always referring to the type of (composite) glue that is being used in these blades. A special coating is not mentioned.
Two examples:
http://www.dandoy-sports.com/stiga-hybrid-wood-nct.html
http://www.futurespin.de/tischtenni...nnisholz/stiga-hoelzer/stiga-hybrid-wood.html
(you probably need google translate for the second link, but it basically says the same)
These are basically the informations that I based my comment on.
I am aware that some shops sometimes release faulty or misleading informations, so we might have to take it with a grain of salt. If however these informations are reliable, then the NCT technology actually refers to a composite glue (which makes the blades stiffer and is therefore very similar to the CC (Chrystal Carbon) technology) and not to a coating of some kind. That doesn't mean of course, that the NCT blades cannot have an additional coating...
Furthermore I wouldn't necessarily say that these informations doesn't matter to the OP. He mentioned in his first comment that he is starting to dislike the vibrations on his Allround NCT. Now, if we are indeed talking about a composite glue in regards to the NCT, it would mean, that an NCT blade is on average stiffer than a regular all wood blade and that he would need an even stiffer blade than his Allround NCT, no?