
Darth Momin had a pretty good fight with Vader back in the day. It was definitely a close battle although Vader did win in the end. Additionally, Vader had already been weakened at the time. At full strength he’d likely win this match fairly quick since while they are both highly skilled fighters, Vader is just more experienced and powerful with The Force. There are very few Sith who could hope to beat him. Dark Vader wins.