Yoda would win easily. He may be as old as time but he still moves like if he was 200. Vader may be young but that suit must be a heavy as an elephante. His lightning wouldn't help too much also since Yoda easily shrugged off Dooku. I know, Vader is better than Dooku but still.
Yoda is awesome because he is short,fast and probably the best jedi master there is. But Darth Vader has Choke and Electricity. So he would choke him.But yoda would jump all around and kill him.Simply said
