I would guess this was an unintentional side effect.The only reason I pointed out the difference between them is to clarify that is why I think there's a difference, because one set can be given/sold to other players, the other cannot so maybe ZoS decided a slight color variance was in order to tell the types apart. All good man.
. So I cant disagree with you because you're right and all this true but this is not what I asked.CANNOT be given or sold to another player