BAR used to stand for "Balanced Annihilation Reloaded" - so it's sticking very close to TA, while Zero-K has been experimenting much more freely with what is possible in the Spring/Recoil engine.
It's also probably a factor that BAR has spent a decade in development hell (under a different team than now ?), so it just didn't have the velocity to fork away sufficiently, even if it wanted to.
BAR used to stand for "Balanced Annihilation Reloaded" - so it's sticking very close to TA, while Zero-K has been experimenting much more freely with what is possible in the Spring/Recoil engine.
It's also probably a factor that BAR has spent a decade in development hell (under a different team than now ?), so it just didn't have the velocity to fork away sufficiently, even if it wanted to.