The answer
Enter a positive amount if the subject rental is superior to the comparable on an attribute and you believe that difference supports a higher subject-equivalent rent; enter a negative amount if the comparable is superior. Every nonzero adjustment requires a written rationale. These are your assumptions, not independently valued differences.
General education and tool guidance. Verify applicable law, lease terms, program rules and your own records before acting; this answer does not approve a notice, deduction, rent or financial outcome.