Actually there is a decent amount of info on the T Wing. It is around the same speed as a TIE Interceptor i believe, and has slightly better weapons hull and shields then an R 41 Star Chaser (which is slightly better then a Z 95 but not as good as an X Wing) However it was suppose to replace the A Wing so it was dumped and sold to pirates and smugglers to make the alliance money.
Nihilus5078 - I must protest about the TIE Defender being put in the same class as the B Wing. It is faster then an A Wing, and tougher then an X Wing with more firepower then a B Wing. It is totally unbalanced since it is superior to any other fighter out there. As much as i love the fighter it would make the empire too strong. Unless they gimp it like they did in X Wing Alliance which bothered me, kinda like how they also gimped the missile boat, bah!
You can sort of modify it so it is in the same class as the B-Wing, you dont have to necessarily do it off of how it was, or you could just bump up the B-Wing. Besides, TIE's are faster than most ships, with the exception of something like a race with A-Wing vs. TIE Bomber, then the A-Wing would likely win. And the B-Wing is classified as a Fighter-Bomber, so it has a mix between speed and armor/firepower.