It's kinda hard oddly.

Had it just been New Hope through Return of the Jedi... i'd say Vader EASY.

However the newer movies completely screwed up Darth Vader, while they kept Yoda, yoda and even expanded on him a bit.

Still i'd go Yoda as I'm not a fan of the "Super short" characters in fighting games. They always seem too cheap.

 Eh, compared to what they did to the Vader character, Yoda's fighting seems like Bruce Lee's fighting.

Vader. Seriously, Yoda will be like Gon in Tekken. Everyone will hate him. Half-sized characters in fighting games ALWAYS suck.

I could care less which one is "cooler" in the Star Wars mythos, I'm thinking purely from a gameplay perspective. Vader will win hands down.

I want a Wii version ='( with lightsaber Link XD
JKJK
But seriously Yoda 100%

I'd prefer Vader, but I only have a 360, so it looks like I'll just be able to get Yoda.

If you compare the lightsaber battles in the orginal trilogy to the new ones, then there is only one possible winner, Vader is an old man when he fights, though the Force Unleashed will show his capabilities in battle straight after donning the suit, cause it would not really be the same 30 years later

Vader.
But how would you hit Yoda without crouching?
A punch while standing wouldn't even touch Yoda.
Heh.

Darth Vader all the way. Yoda is more of a silent and brooding teacher of the force, not martial arts. I really hated George Lucas for the way he pimped Yoda in the fight scenes of Star Wars Ep2. They were so funny I almost squirted milk form my nostrils.

 How was Yoda ruined by having him fight?  You're aware he kicked his opponents' respective asses and they had to pull cheap tricks to escape, right?

I likely won't be buying this game, but if I do it's definitely Yoda for me.  It's ridiculous that they can't fight each other, though.