I was confused how the mechanist is still alive, i haven't put much thought into it, but how is he alive if you have a choice to kill him in fallout 3? I'm not to up-to date on fallout 4 as i been busy with a lot of things. Is This the same mechanist or is a new mechanist?

Maybe he's like the Silver Shroud. Whoever wears the suit is The Mechanist.

neloth is alive. so is the mechanist.

deal.

Fallout 4 doesn't do multiple endings, they have their own set of canon like it's canon that the Brotherhood won in Fallout 3 or how Lyon didn't die as a hero in the ending.

With that being said, we don't know who the mechanist actually is. Could be some copycat or it could be him.

It's probably not the same person. My money is that it turns out he is derik Pacion.

Yeah I'm with everyone saying it's a different person. The voice is different enough and I think this new one may actually be shorter than the one from Fallout 3.