To the best of my knowledge (and I welcome someone to correct me if I'm wrong on any of this) there were three versions released by hot toys.
The first release was simply called Death Trooper, and came with all three weapons (pistol, rifle, and scoped rifle), had no shoulder clips, no pauldron, and no grenade belt, and had the range finder attachment on his helmet.
They later released the Death Trooper Specialist and the Death Trooper Specialist Deluxe.
The Death Trooper Specialist only had the rifle and pistol (missing out on the scoped rifle), and also came with the grenade belt and shoulder clips, but had no pauldron and no range finder attachment on his helmet.
The Death Trooper Specialist Deluxe only had the scoped rifle and the pistol (missing out on the regular rifle), and also came with the grenade belt and shoulder clips, as well as also coming with a black pauldron, the range finder attachment on his helmet, a stormtrooper doll, and a themed display base.
Hope that helps.