I wouldn't be so sure the Cordi are less advanced than the LSF.
Judging from ingame chatter they were able to build much stronger ships than the mothership, but the Hertak forced them into not doing that.
As for massive swarms of weak fighters, that could be either a result of their social structure, were the individual seems to count far less than in Human society, or it might also be something impsed onto them by the Hertak.
The LSF certainly was very surprised about the Cordi being able to mount jumpdrives on such tiny fighters, so at least in terms of jumpdrive miniaturization the Cordi are better than Humans.
As far as I gathered the backstory, the Zy and Fura'ngle share the same technology, though the Zy seem to have better designed ships. Wether their technology is superior or inferiour to Cyrvan technology is rather hard to judge, since we know so little of either.
But consider this: Crystal was surprised about the enemy jumping inside the jump inhibitor field, so they have at least some tricks up their sleeves that the Cyrvans don't have.