Well, I'm going to keep this short and sweet as much as possible.
Let's say I had the full set of Vabbian Elite armor (also known as the 15k, even though it's about 5k and a bunch of expensive gems), in Vabbian area, I would recieve like a +20 bonus, in ONLY vabbian areas, if I have the FULL set of Vabbian armor (Helm, Gauntlets, Boots, Body, and Leggings).
The only real difference between 15k and regular armor is HoM if you have the full set. Some people prefer to have some 15k Imperial and some 15k Vabbian as an example, so looks don't make people buy the full set, and not to mention a lot of people skip on the helm and choose to hide it.
So basically, if I bought 15k armor in an area, everything that corresponds with that area (for example, the 15k (or 10k) armor in the desolation would make you recieve a +20 armor bonus in the Desolation.
t
