I actually like Vader over Fett simply because his ability is continuous whereas Fett's ability only works when he first enhances the fighter unit, and you need other ways to detach and reattach him for more captures. Also, Vader's pod will work well with other Sith and Navy TIE pods, but for Fett you don't have many other Scum pods with the same focus on vehicle, so you'll have to splash him with either Sith or Navy, but Vader can do that much better by comparison.
But after the disappointing DS pods from Evasive Maneuvers, I'm glad to see DS having two very strong sets in Attack Run.
I think for me I can see about 3 different ways to incorporate Fett into a deck. Vader is definitely a 1 trick pony. You might not play him all black squadron but it's definitely a Navy or Navy/Sith Ties deck. Did he make them stronger than they are? I'm not sure. He doesn't come with resources which is a downside for me, limiting some of his versatility outside of Black Squadron.
But I like combos and I like that Fett's set is a mixture of aggro and removal control with lots of combo options. I kind of wish both ships were Elite but I'm not going to complain. Elite was getting a bit of of hand anyway.
But I'm totally stoked to try them both.