If you see the Exile's conversation with Zez on Nar Shaddaa, you'll clearly see him taking the Exile's side and talking about his decision to leave the Council on the very day the Exile was cast out. He also said that it wasn't the Exile's fault that he went to war and that he had lost Padawans who joined the war too. I really thought he was different from Vrook but then again on Dantooine he finally turns out to be as cranky and stingy as Vrook and possesses the same "arrogance" which he detests so much. Hypocrite alert lol.
Atleast Vrook is honest about hating the Exile from the beginning, but Zez really pissed me off lol.