This is why cross-genre matches are so difficult. There is far more knowledge of the comic character than the non-comic character, so the majority will always side with them in a non-stomp match. Then there will be a few on each side that just irrationally support one genre. And a select few that actually know both characters well and can analyze the match without marginalizing either one to only 1-2 attacks or possibilities.
Most of the other genres in these matches I know very little about. SW is not one of those however, and I can claim a fairly nuanced knowledge of both of these people, including EU appearances for Vader (which, yes, I count).
Tony would have the first strike, and it could be a brutal one. But assuming Vader survives the initial assault, he does possess the tools with which to win. Using all of his telepathic, telekinetic, lightning powers, etc. intelligently, in conjunction with the limited pre-cog that the Force provides him and a degree of super speed and strength, he could harass Tony, cause some damage, and try to force the match into melee range via his tk, at which point Vader would have the advantage because lightsaber > armor and his pre-cog could have him dodging most if not all of Tony's blows.
Still, IM for the majority, only because that would take time and wouldn't be easy to pull off with Tony attacking continuously. I'll say 7/10.
Also, slightly off-topic, Mshinu, a non-jobbing Luke wrecks any kind of battle droid. One low showing does not an argument make.