TR = NOD/China/Soviets NC = GDI/Allies/Allies VS = Scrin/PLA/Japan Although, to be fair... The PLA is probably bad analogy for the VS, unless you want to play VS like Battlestar Galactica Cylons, then full on PLA with crashing Scythes into enemy air or vehicles, given the PLA has suicide bombers and all. Theoretically, though, VS are also sort of closer to NOD on some respects, given the whole Laser thing, the GDI has the Mammoth Tank/Walker which the Walker is closer to NC for heavy firepower, but the Mammoth is classic Soviet/China dual spamming cannon tank.
If PS2 was part of the C&C series... Then it would be dead and buried with the IP locked away in some EA vault with the key thrown into the ocean. ... But at least then the upcoming Ion Cannons would have been much more Ion-Cannon-y by firing a magnificent lazer from the sky, rather than lob some artillery blobs.
Aesthetically (and tactics-wise to a degree - hit fast, hit hard) TR resembles NOD, however, NOD rambles a lot about "oppression" etc. and that gives off a very NC vibe. Still, TR & NOD - nothing beats black and red.