Completely unrelated to the previous two questions, but!

For soulless shinki that look like other characters (ie. Add's soulless Heru, Hakkai's soulless Asshole this statement needs so much context), how close to the "real thing" are they? Add has cybernetic implants in his eyes, so if he checked his soulless doppelganger would he be able to identify the same tech in Heru? Or would Heru be missing the implants and only have a normal human body? Would they have any supernatural abilities that the "real" version had, or would those be missing as well?