Advent Fighters are the best SC for Fighter combat, with 9 Fighters per squadron. Each Advent Fighter has 40 HP and 1.5 DPS (Or 1 DPS, not entirely sure). Whereas TEC squadrons have only 6 Fighters, each with 75 HP and 2/2.5 DPS. In an actual Fighter-Fighter battle, Advent fighters are more likely to be the victors.
Generally though, Vasari have the best SC for attacking frigates, because of their Phase Missiles and better durability (1 Vasari Fighter has 95 HP). Advent Bombers are exceptional, with 7 Bombers per squadron, but their Fighters are exceptionally frail against Flak. TEC SC are more of a middle ground between the Vasari's strong-but-few squadrons and Advent's many, but frail, squadrons.