I noticed when I played last night that when you hover over an item that the vendor is selling, it compares it to the item being worn by whichever party member you interacted with the vendor with. However, when you double click on another character within the vendor / bartering screen, it doesn't change the inventory comparison. I think it should and that perhaps this is a bug. However, i could be wrong so i wanted to check if this was happening for anyone else.
* I interact with the druid vendor with my fighter, and the amour on the vendor get compared to the fighter's worn armour - good
* Then I click on my cleric at the bottom of the screen to swap to her inventory within the selling/bartering window, but when I hover over an armour in the vendor screen, it still compares it to the fighter's armour.