They're not. That's fitting a square peg into a round hole.Nah, I think they're one in the same. Z.W.E.I.'s backstory as written in New Legends of Project Soul is very similar to Grøh's, and E.I.N. may be a future development / an unforeseen consequence of Azwel's experiments. It's certainly not impossible, with Raphael's story foreshadowing SoulCalibur V still happening, that this is a really sneaky way to give Z.W.E.I. an origin story, to catch us off guard with the reveal in SoulCalibur VII.