In the context of writing-to-others,
peer response and copy editing are distinctly different.

The act of commenting in peer response
is intended to address:

• the Perception Challenge
  (which is located in The Plain of Perspective) OR
• the Execution Challenge (which is located at the Bridge of Execution).

The act of copy editing is intended to address the Acceptance Challenge (which is located at The Refiner's Fire)

See the difference(s)?