Which is dumb point because power alone doesn't win duels, not that Jerec really has power comparable to Vader's anyway. Jerec is a weak link, and Yoda takes him out early before moving on to Vader. So while killing a bunch of one offs with no names is impressive, unless they are comparable to Yoda in anyway, or unless you think Vader can beat Yoda, this match is all but certainly in Yoda's favor.