Worst parallel to Will and Hannibal was definitely horse guy and Peter. Peter was genuinely good. Will was so eager to think they were the same, to empathize, feel less alone in his pain, yet…In the end, what matters most is exactly what he told Peter himself, “I envy your hate”. As much as Will wanted to relate to Peter, he still chooses to let his killer live. He would always choose his killer. And he knows. It’s why, when Hannibal suggests that Peter is in the same darkness as him, Will says “I’m alone in that darkness”.