Winning a price comparison by changing the unit of comparison

On the search page the brand's razor appears beside a competitor at less than half the price, and the shopper has two numbers and two photographs to decide between. The brand's product genuinely costs less to own — its blades last far longer and cost less per unit — but that arithmetic lived in the founder's head, not on the page.

Advertising made this worse rather than better: every click brought a shopper who had just seen the cheaper option, arriving primed to find the price unjustified.

We changed the number the shopper compares.

• Cost per shave in the image stack — the comparison the brand wins, shown as plainly as the price is.
• Blade longevity demonstrated rather than claimed, with the replacement cycle stated in weeks.
• Refills enrolled in Subscribe & Save, cross-referenced from the razor's A+ and the brand store — the subscription is set up on the refill listing itself, it cannot be attached to the razor at checkout.
• Competitor-aware targeting — Sponsored Display on the cheaper competitor's page, where the cost-per-use argument has the most leverage.

Conversion rose from 5.1% to 8.3% and revenue grew 89%, with the sticker price unchanged at $34.

The refill attach rate more than doubled — 22% to 49% — which matters twice: it is the profitable part of the business, and it is also the proof of the pitch, since a customer who buys refills has accepted the ownership-cost framing. ACoS fell eleven points because the traffic arriving from the competitor's page now converts instead of bouncing on price.