His info post has been updated, but re: canon vs. AU differences, you mean in the claim request above..?

If so: in addition to historical changes, Celebrimbor looks different now. He has scarring across much of his body, and both hands, his ears, and a leg were badly maimed. He's also missing an eye, and some of his tattoos are there to celebrate or disguise the scarring. Personality-wise, he's much older and has little patience for foolishness any longer. He has a lot of trauma he deals with very badly. Otherwise, he's still as quiet and withdrawn as he always was.