Not necessarily an “accurate” image, but I think it’s helpful in that it illustrates the overlap various adjacent genres and sub-genres can have. Tech Noir has a lot in common with Cyberpunk, and I’d definitely say there’s overlap in the genres. (Depending on who you talk to, one might be a sub-genre of the other.) Both constitute grim warnings of how technology can affect society in the future, but I think they have a different specific focus beyond that.
In the tales of Cyberpunk, underdog focal characters often co-opt existing bits of corporate tech to rebel or fight against their profit-driven overlords. The warning about technology is there, but alongside it is the theme of using that tech against the oppressive forces it has enabled - hence the “punk” part of the name. (Screw the Man!)
That underdog rebellion aspect isn’t a necessary part of Tech Noir, but the warning about the imbalances that technology can cause is - at least when it comes to narrative themes. When it comes to visual themes, there’s also an aspect that recalls classic Noir film through the lens of that sinister technology - Bladerunner being the quintessential example both in narrative and aesthetics. (Be careful what you wish for.)
I’d say the later Deus Ex games fall comfortably into the Tech Noir genre, with the added aesthetic sub-category of Cyber Renaissance, a term I’m pretty sure the art director behind those games coined but that can describe an aesthetic shared by other media. I’d say these games do fall under Cyberpunk, but more as an offshoot branch than the central example depicted in the Venn diagram. Cyberpunk is often just a bit crusty and ramshackle in its aesthetics, displaying its seedy underbelly for all to see - while Cyber Renaissance tends towards the glistening and elegant, only hinting at the sinister possibilities of technology in terms of visuals. (I never asked for this…)
That’s pretty much all just opinion straight from my bum, but hey I find this stuff pretty fascinating and this whole family of various media and the genres they emerge from are among my very favorites, and I can’t resist jumping into a discussion about it.