Actually the T-Bolt and the Vaktoth are almost equally manouvreble though the Vaktoth has more missles and speed. However it lacks the Torpedo of the T-Bolt macking it less effective against capships.
And the Longbow has a lot more shielding and armor, a more powerful rear turret and more afterburner speed than a Paktahn. If had to choose between one of the bombers I'd take the Longbow anytime.
Its true that the heavier fighters can compete with their terran counterparts but I think Confed still has a slight advantage thanks their superiority in defensive technology.
As of Pakthan - yes it has less shields and armor, weaker turret and 2 less missiles, however it carries more torps, is mor manouvreble, faster in cruise speed, and have waaaaaaaaaaaay stronger gun array (actualy scecond strongest ingame after excalibur) as for vaktoth's manouvribility comapared to T-bolt. yep, according to manual they are almost the same, however the manual data isn't that accurate (because the manuals were made befor final balancing of the game), and i always felt ingame, that vaktoth had some edge over thud.
I'd agree with the final statment but still, the hevies are almost equally matched, while light fighters of the cats are waaay inferior with darket having less than half arrow's shields, around three quaters arrow's armour roughly 2/3 of it's gunpower and four time less misiles ...