Resume A/B Compare

How to Read an A/B Resume Comparison

The reason to compare two versions rather than simply scoring the new one is that a rewrite almost never improves a document uniformly. You tighten the bullets and accidentally cut the only number in the summary. You add quantification and push three bullets past the length where anyone still reads them. A single score hides that; a per-criterion comparison shows it, and shows it in the one place where you can still act on it.

Look at the criteria before you look at the total

A four-point gap tells you very little on its own. Where those four points came from tells you a great deal. Gains in achievement focus or quantified evidence are substantive: they mean the document now makes claims a reader can check. Gains in end punctuation or date formatting mean the document is tidier, which is worth having but will not change anyone's mind. Two versions can sit two points apart while one of them is a materially stronger case for hiring you.

Expect the answer to be "take some of each"

When your rewrite is ahead on some criteria and behind on others, that is not a failure of the comparison — it is the most useful thing it can tell you. The verdict names which parts of which version to keep. In practice this usually means taking the newer version as the base and pulling back the specific summary sentence, or the one bullet with the good number in it, that got lost in the edit.

Use the diff to catch what you did not mean to do

The diff pairs a removed line with the line that replaced it wherever the two are recognisably the same bullet, so an edit shows as one changed row instead of a deletion and an unrelated-looking insertion. It is worth reading even when the scores agree with you: the most common thing it catches is a genuinely strong, specific line that was dropped during a tidy-up because it was the longest one on the page.

What this comparison does not measure

It compares writing quality, and only that. It has no view on which version fits a particular job, because it has not been shown the job. If you are choosing between a generic resume and one tailored to a specific posting, run each of them through the free ATS resume checker with that job description pasted in — keyword and requirement match is measured there, not here. It also cannot judge whether the achievement you chose to lead with is the right one for the role, which remains a judgement call for someone who knows your field.

A sensible loop

Run your current resume through the single-resume review first and work down the prioritised fix list. Save that as your version B, then compare it against the original here. If a criterion went backwards, you will see exactly which one and can put back what you lost. When both versions are strong, rebuild the winner in a clean single-column template with the free resume builder and check the layout with the ATS checker before you send it. For a non-commercial second opinion on the writing conventions themselves, the Purdue OWL resume guide is a reliable reference, and the National Careers Service guide to CV sections covers the UK conventions, which differ from the US ones in several places.