Poll
38%
63%
There's no way ROTS Vader would win. He loses 1/2 his power when he gets injured and burned, then gains some back during the gap between ROTS and the OT, making ESB Vader over 1/2 as powerful as ROTS vader, same with ROTJ Vader. Lucas says OT Sidious is only 20% more powerful than OT Vader so the 2 Vaders. Not easily, though.