I find it quite interesting that TRay chose two (in PS1) common pool vehicles to illustrate the TR and NC design styles.
Possibilities Include:
- They're no longer common pool (I doubt it)
- Each empire will have relatively subtle design changes to some/all common pool vehicles (possible)
- TR originally developed the mosquito and NC the liberator in the "in game lore", and the other empires copied them. (my guess)