(edited by novamegaman.1427)
Dungeon armor and transmuting
Rare versions of dungeon armor are pretty much rare stats for the dungeon’s relevant levels (i.e. AC has level 30ish rare armor) and they have generic skins (pirate for medium armor, for example). Only the exotics have the “unique” skins.
If you wish, you can preview (right click on the NPC’s armor menu) the rare skins at the dungeon vendors in Fort Mariner of Lion’s Arch to see that they are generic skins in comparison to the dungeon’s exotic skins.
You can transmute the exotic skins with your crafted exotic stats.