Verdict
Choose PageSpeed Insights when
- Technical SEO matters to you. Useful page-level performance and SEO diagnostics, but not a site-wide crawler or issue-management system.
- Free tools matters to you. The complete PageSpeed Insights utility is available free on the public site.
Verdict
Choose SEO Stuff when
- Keyword research quality for SEO content matters to you. Strong documented keyword metrics, filtering, intent and scale for a lightweight product.
- AI-search / GEO matters to you. AI-search visibility and citation optimization are explicit product/service goals across several current pages.
- GEO readiness matters to you. Good documented readiness for major AI-search surfaces, though no independent measurement method is provided.
- Research depth matters to you. Useful but focused keyword and backlink research rather than a full enterprise SEO data suite.
Read the full reviews: PageSpeed Insights and SEO Stuff.