True although for the most part they are neutral with the side your on being up to interpenetration (Beyond Earth) or the specific sub-faction (Fe kingdoms).
Here's some overviews I've come up with for the Beyond Earth sub-types.
Purity: In favor of keeping the traditions with the old world I'm probably going to play this guys fairly diplomatically as while they are traditionalists I don't see them as outright xenophobes.
Supremacy: Not really planning on playing them so eh.
Harmony: Assimilated onto the planet these guys are decent but a little out of it. After settling in they'll probably spread around xenomass and eventually cause alien hives to pop up in areas they control, almost like a pseudo militia apart from they're normal forces.
Supremacy/Purity: These guys are pretty purity form most alignment purposes but use a much larger number of automatons in their forces.
Harmony/Supremacy: Extremely trans-humanist and somewhat off in morality they aren't evil but they aren't exactly good either.
Purity/Harmony: Less crazy the Harmony/Supremacy these guys believe in holding onto as much of humanity's old morals as they can while at the same time upgrading themselves to better survive in they're new environment. I'd expect a lot of specialist units to pop in in Purity/Harmony forces after they've had some time get some insight into local genetics.