Short answer: they're not competing for the same job, so "which matters more" is the wrong question. Reviews and owned content are two different kinds of evidence, and different AI engines lean on each one differently.
What each one is actually evidence of
Your website's own content — the words on your homepage, your schema markup, your FAQ — is the business describing itself. It's necessary, but an engine has no way to know if it's true just by reading it. A business's own "we're the best" is not independently verifiable.
A review is different: it's someone other than the business saying something happened. That's the value — it's confirmation from outside the business's own control. A site with excellent content and zero outside confirmation is still, from an engine's perspective, a single unverified source.
Different engines lean on each differently
This isn't uniform across AI systems, and it's one of the more consistent patterns we see running audits: engines built around structured data — Gemini is the clearest example — put more weight on a site's own schema and content being clean and complete. Engines that pull heavily from community discussion and review platforms — Claude is the standout here — weight reviews and community content noticeably more. Perplexity tends to lean on niche, category-specific directories over either. None of this is fixed forever; it shifts as these products change. But the pattern of "different engines trust different evidence" has held consistently enough to plan around.
The trap: optimizing for one and neglecting the other
A business with a beautifully structured website and no reviews looks great to one engine and invisible to another. A business with hundreds of reviews and a site with no schema, no clear NAP, and thin content has the opposite problem. Neither is a complete strategy on its own — this is the same idea as the hub, spoke, and node model: the website is the hub, and reviews are one category of node. A hub with no connected nodes, or nodes with no hub to connect back to, both fail to add up to something an engine can fully confirm.
The practical answer
Fix the owned-content side first — it's entirely inside your control and it's what makes a review, once it exists, actually confirmable as belonging to you. Then build genuine review volume across the platforms your specific engines and category actually check. Doing one without the other leaves a real gap, and which gap it is depends on which engine someone happens to be using.
For the full breakdown of what gets fixed and in what order, seehow the audit works.