Oh come on ! Yerss vs Vader ? Its a no contest ...
firstly, there's no way Vader would be able to get around yerss's spellings ...
secondly, trying to force choke yerss wouldn't work ... one whiff of yerss breath, and the force would run in the opposite direction.
As for lightsabres ? well Vader may have a lightsabre ... but yerss has 13000+ posts ! 😎