I don't know how individual fighters from the different franchises compare, but an all out war is just unfair. In the first game, a Shivan destroyer was able to glass a world from orbit within 14 hours. In the second, it's revealed that they not only have ships with an order of magnitude more firepower, but they also have a ridiculous amount of them. Unless the Kilrathi have some sort of space magic they're absolutely ****ed.