Drybrush, Drybrush and some more Drybrush. One of them have had the arms re-positioned into an all-out attack pose to make them look different.
Can I just say for the record that yes, the Slayers are not much stronger or durable than the other factions light jacks, but so far I have yet to play a game where my Slayer does not kill his worth in points so they are not completely useless if used correctly.