Going to start something new here, and write up a few thoughts for each of the missions I play through. We're picking up about 2/3rds of the way through the Rebel Campaign for the classic Star Wars: X-Wing versus TIE Fighter: Balance of Power.
Once again, this mission starts off with a choice between the X-Wing for space superiority, and the B-Wing for attack. A massive swarm of Imperial capital ships shows up, including a pair of Imperial-Class Star Destroyers, and all of them have to be destroyed to complete the mission.
Flying the X-Wing means fending off waves of TIE Bombers, plus the usual horde of Fighters, Interceptors, and the occasional Avenger and trying to keep them from destroying the two Rebel capital ships you're defending. Meanwhile, the B-Wings are supposed to be attacking the Imperial ships.
Choosing the B-Wing (as I ultimately ended up doing) means focusing more on capital ship attack, and occasionally helping with the fighters. Taking out the Star Destroyers first will also help reduce the number of TIE craft attacking everything else.
I feel like the B-Wing is an easier choice. Taking on the various TIE waves is manageable, but by the time you're dealing with the fourth wave of Bombers, the Liberty and the Peregrine are both pretty banged up.
Whatever you choose, good luck!