Hm, can't forget about the inputs/outputs to the system. If
  they're different, we're different. Did you know that no two
  people hear exactly the same? We can't; our ears are all shaped
  differently. For most practical purposes, it doesn't make much
  difference, but, still a difference. I was born 1/2 deaf; more
  than - one ear is tinny and can't hear anything and the other
  only goes up to 5000 hz. Yet, I have perfect pitch. I hear the
  world differently. My neuronal configuration was shaped by my
  inputs; it didn't come out of thin air. Even a copy would be
  different if it had different ears and would be a different
  person, whether digital or analog. - but that leads more into
  another question [1]Seedy Johnson posed again, which is still in
  my head.

  The key thing is: "as long as" and "exact". Strict standards
  there. Unless we reach the "as long as" "exact", the
  foundational material remains relevant.

References

  Visible links
  1. https://www.facebook.com/seedyjohnson?hc_location=ufi