Nordera have a big obsession with guns and cannons
Every building on a Nordera colony has at least one or two guns strapped to it.
Several Nordera cities have been reduced to smoking craters because of simple kitchen fires. It's like one big gunpowder keg.
When Nordera warlords fought each other (before the Hertak appeared) in settlements, it was usually done with melee weapons.
Fleet size, character design (though the benevolence apparently shrunk them), a certain supercillous contempt for all things human until it's abruptly beaten out of them, and a loose organizational structure.
But Cyrvan's aren't green skinned
(Or have millions of ships in a poorly maintained state, with women and men in seperate fleets etc)