Syndicated data arrives six weeks late and tells you nothing about who bought. Walk into the review with proven sales per store, per week, and the names behind them.
Six of those pages walk the buyer through the argument directly. Each one states its own sample size and where the numbers came from.
One brand's Q3 buyer review, and the reset that followed it — an example, not a benchmark.
Keep buying the syndicated panel — it tells you the category story. This tells you your story, with names attached.
Nine real pages from a real campaign, with the brand details removed. Forward it internally and see what your buyer says.