IMHO bears mentioning by Pifall's standards every other faction is a terrorist Org. Hell, by real world definitions, splintered as they are, that's the case.
Everything below is probably mildly incorrect but it's the best I can recall with the effort I'm allocating.
Banshee Netters are idealists. They work to create a world of unrestricted data travel in which freedom is the standard everyone lives by. They're much more about using the facade of the status quo to protect their interests and blackmail/coercion to produce results. Not that they can't get bloody, but it's really not BN style. They created and released the Mouthwash Confessional, and are essentially responsible for the WoF climate of fear and paranoia as the power structures rocked by Confessional backlashed spectacularily.
The archetypal Banshee Net agent is brilliant, controlled, and utterly on top of a situation he saw 10 moves ago.
Allies: The Shadow Patriots, The Krypt.
Comparitively the Nine Tigers Dynasty is the physical expression of it's founder's faith in the prophecy of the 9th Dynasty. That a perfect warrior will rise to lead it to power, and though that prophetized warrior came as a pair of precocious jet-setting rave bunnies who also happen to be, precisely speaking, totally unstoppable in skirmish combat is hardly an obstacle to that.
9TD loves combat, and are balls out the single deadliest faction. That they're into archaic forms tends to mean little in the small-scale warfare of the spy. The 9T Khan (who's name totally escapes me) plans to ride his the destined greatness of his daughters into a new Chinese era of world supremacy (though for my money I'm curious just how well they'd stand up in actual battlefield combat) and has been stockpiling WMD of all kinds towards that end.
The archetypal Nine Tigers agent is ruthless, agile, and supremely dominant in hard-to-hand combat.
Allies: None. The 9TD are quite off the radar compared to the Banshee Net, and are quite happy to keep it that way until it's quite too late.
The Shadow Patriots are the struggling remains of a very unofficial Soviet and NATO join power control conspiracy. As the Cold War commenced spies on both sides of the Iron Curtain realized the advent of nuclear arms had created a potential for annihilation unrivaled in human history. Their greatest mutual fear wasn't that World War Three would indeed be 45 seconds long, but that the same deranged megalomaniacs who'd threatened the world for all it's history before would as well have a similar boost in disastrous potential. Thus a pact was formed in the greatest caution and secrecy: protect the world, no matter the time, place, or cost.
The Mouthwash Confessional would prove their undoing, cost them patronage by the British Crown and causing a schismatic rift that created the Krypt.
Driven by their quixotic quest to defend the world that calls for their extinction, the Shadow Patriots keep the lamp lit to the last breath.
The archetypal Shadow Patriots agent is the walking avatar of omnicompetance, prepared mentally and physically for any arena of conflict or challenge, regardless of the stakes. Never tell a Shadow Patriot "failure's not an option." They know that; it never was.
Allies: Banshee Net, The Krypt.