Yes the one on the right. The armour differs from those members of the Death Watch you encounter in Galaxies, who wear a more traditional Jango-esque style of armour; but that is a Death Watch Mando. The others are a Mandalorian Crusader (pretty much the original Mandalorians) and a Neo-Crusader from the KOTOR era.
I dont like the little antennae type thingys over the visor, but i think its a pretty cool costume. I would probably go with darker colors as are seen in Open Seasons.Probably sans gauntlets as well as it appear most have wraps around their wrists instead.