I can give a little of the design background on this one. The Tech knives are very beautiful. The mix between the brushed SS blade (SS on most of the models), the black Kraton handle, the brass cross-guard, and the sexy grind-lines make for overall stunning good looks.
In making the Midnight Tiger and the Nite Tech (I'm trying to remember if there where any other "nite" knives), the goal was to make it stealthy. In both of these knives, they certainly succeeded. Though the brass cross-guard is the standout feature which makes the knife unique, SOG couldn't keep that bright part and make it deadly in the dark.
I've handled dozens of these knives (the Midnight Tiger and the Nite Tech) and they have made a profound impression on me. When blued, a strangely surprising "dark" aspect of their innate personality is brought out.
I can't say for sure, but I thought the Nite Tech was sold through other venues. SOG has sometimes introduced a knife through an "exclusive" arrangement, then continued it after those sold out. In this case, I can't say for sure.
The most recent example I recall is when SOG offered a modified version of their Tigershark to US Cavalry and then made those changes on their standard model. I think it was when SOG added the serrations. My brain isn't working this afternoon, but I think the US Cavalry name was the SEAL Master (or something like that) and that SOG considered using that name on their newly updated version.