It's probably already been commented on (and completely off topic) but I always saw the games and the GTVA behaving like this.
FS1: is reminiscent of WW1 for obvious reasons, the phrase "Great War", the feeling of it being a pointless and unnecessary war (the V-T war) and the obvious aftermath lead to yet more bloodshed (the NTF could represent a broken Germany). Flying in FS1 makes me think of Spitfires getting up behind bombers and letting rip. Technology isn't the best it could be and things like ACES flying the skies.
FS2: is WW2. A war involving atrocities against civilians (the NTF uprising) a war built out of a previous war. It's less about great pushes and going over-the-top and more about technological edges.
The end of FS2 makes me think of the modern age, where the Aries and the Trebuchet represent modern fighter jets, expensive technology and weapons that can end a fight in one shot, over massive distances.
BACK ON TOPIC: The Sathanas always impressed me more then the Lucifer, because I played FS2 first. I remember the first time I played the game, and I couldn't fathom how the GTVA would survive. I mean, i really didn't see there being any hope of survival. That hopelessness is something i love about the game, theres no plucky humans saving the day. Everythings out of our control