yes starkiller proved stronger then Darth Vader in both the force unleashed 1 and force unleashed 2.
Darth Vader was Galen Marek's master, and Luke Skywlker beat Vader. So I suspect Luke would outclass Starkiller.
Darth Vader would win. He can use the force.
Darth Plagueis
While Starkiller was undoubtedly an impressive fighter, Revan was a highly skilled Jedi Knight, and a very powerful Sith Lord. The greatest of the era. As awesome as Starkiller is, I'm afraid he'd be no match whatsoever to Darth Revan.
Darth Vader
Darth Vader would win.
Darth Vader
Definitely Darth Vader
darth vader
Darth Vader.
Darth Vader
Darth Vader. He has 'the force' and a lightsaber.