I recently got the Feral Legs (Fiery Red Maimers) and after using BiB, on my Guardian Spec, it wants me to equip them over my Guardian’s Elize’s Everlasting Encasement.
They are the exact same Stats. The only different is Elize’s have something useful for Guardian while the Feral does not. AMR BiB asked me to put the Feral ones on for some reason. This is obviously some kind of Bug because same stats = use the one with an actual useful ability.