As for space superiority, it worked different than the X-wing.
It did. It only had two blaster cannons, for a start. It made up for that with a heavy payload of concussion missiles and multi-role functionality with it's 2 ion cannons though.
Again, it's faster and more agile than both the Y-Wing and B-Wing, by quite a margin as well. Of course, both those ships flew like pigs anyway (although the B-Wing has the advantage or really powerful shielding and powerful weaponry).