The Boba Fett PF exclusive item sucked!
Still I don't get how that really affects the Marvel line and why based just on this you'd think SSC like Marvel better. As others have said, it's a valid point that you can't compare sculpting a comic likeness to an actor likeness, getting the likeness of an actor has got to be much harder, so straight away that gives the edge to the Marvel PF's.
Also even with the SW novels and movies, Marvel characters have forty plus years of monthly continuity, often in several different comic books at a time, adding up to thousands of stories. Captain America has featured in far more stories than Boba Fett, so again because of that you've more looks and props to choose from when coming up with an exclusive item.
It's just circumstance but IMO both lines rock and are treated fairly by SSC.