I replaced one of my Polaron DHCs for a Voth one for the LULZ. It was a mark level higher and I needed an [ACC] mod, so I got one with [Acc] and [CritD]. I really don't notice much a difference in combat one way or another really. I do like how the cannon bolts are slightly more mauve-colored version of the polaron though!
That said, I agree with most posters; unless you're trying for a proton damage build or haven't gotten pure polaron weapons with 3 modifiers yet and are just using these in the meantime, these kinda suck.