So, a mid-PS large base ship with a 180 firing arc can be dodged like anything else, but a PS2 Y-Wing is the best Ace-hunter, implying that the Ace will have trouble dodging his front firing arc?
I agree that the stresshog is a wonderful tool to have against aces because it's true that they will do everything to avoid being double stressed, but if we are speaking about dodging a firing arc, the ace will have much more trouble dodging the YV-666 arc than the Y-Wing one.
The stresshog doesn't care about damaging the ace, though; all it's looking for is one shot, in arc, at any range. Green dice irrelevant. Once the ace is tagged the rest of your squad does the hurting part.
A YV is going for sheer damage (or a narrowly failed evade roll if it's an ion cannoneer). It's probably getting at least one shot, but it's also likely it'll be at range 3, therefore, autothrusters.
So I guess I'm assuming worst case scenario -- we exchange pleasantries at range 3, and then my opponent pulls off the perfect maneuver and spends the rest of the game dodging me. Who is going to do more for me in that slim band when the ace is most vulnerable, stresshog or Moralo?
It should also go without saying that one of the two ships in this conversation is roughly half the cost of the other.
I like the Moralo build, but I don't think it's as efficient, dependable, or versatile vs. non ace matchups.