Use Gemini to compare two documents side by side without a spreadsheet
Drop both files in and ask for differences in decision, not wording. You get the gap that matters.
Versions of a contract, two drafts of a spec, last quarter's report versus this one - comparing them by eye is where errors hide. Gemini takes both files in one chat and keeps them straight.
The prompt that works: 'Compare these two. Ignore formatting. Tell me where they disagree on facts, commitments, or numbers.' Wording differences are noise; the disagreements are the reason you are comparing at all.
I always ask it to quote a short snippet from each side at the point of conflict. Without the quote I cannot tell if it is right, and a confident 'they differ' with no evidence is worthless.
Use it as a second pass after your own quick read, not instead of it. It is fast at spotting the gap; you are still the one who signs off.