https://solomon-rasmussen.blog....bright.net/from-all-
Throne and Liberty Gear Upgrades Upgrades can sometimes increase the power of a piece of equipment and sometimes even its extras. The value of these upgrades is determined by their tiers, requirements, and the amount of random augmentations applied. For instance, the premium racial shield Razortail is commonly upgraded for its lightning absorb capability in PvP or to add additional defenses on missile based builds in PvM. This makes it more exchangeable over the unupgraded version