Under perfect conditions the DDS can hit up to 400 damage, although that's not posible in PvP.
But there's a small counterpart to the dds's spec. There's some kind of lagg or delay between specs which gives the victim some time to heal, whilst the dclaws have none of that.
Basically, you don't hit so hard with the dclaws, but you hit much faster, which is why it's such a good rusher or "surprise-surprise!" weapon