Compare document versions in two focused passes

Comparing revisions is easier when you separate content changes from visual differences.

1. Save both originals and identify which is the agreed starting version. Label working copies clearly so neither original is overwritten.
2. First compare section headings, facts, numbers and conclusions. Record additions, removals and contradictions without fixing everything immediately.
3. Then review formatting, captions, table labels and internal references. Check that moved sections still point to the correct places.
4. Create a short decision list for unresolved changes. Confirm who approves the final version before producing a clearly named merged copy.

A comparison tool can highlight differences, but it cannot decide which statement is correct. Verify disputed content against the relevant source and retain the originals until approval.