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Technical comparisons: criteria, real values, no side taken. No pricing.
- PAGES
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- WORDS
- 2,297
- ARIA or semantic HTML If semantic HTML already carries an element’s role, adding ARIA brings no benefit; ARIA is only for what HTML cannot express.
- WCAG 2.1 or 2.2 WCAG 2.2 adds nine new success criteria on top of 2.1 and removes one; a site conforming to 2.2 also conforms to 2.1.
- IndexNow or a sitemap A sitemap is a list the engine reads; IndexNow is a notification sent to the engine — one pulls, the other pushes, and neither replaces the other.
- JSON-LD or Microdata Both express the same schema.org vocabulary; the difference is where the markup is written — JSON-LD in a separate block, Microdata embedded in the HTML.
- hreflang or canonical hreflang declares the language versions of a page, canonical picks the preferred address for the same content; they are not rivals and one cannot stand in for the other.
- gzip or Brotli Brotli typically produces output 15–20 per cent smaller than gzip on text files, but compression costs more.
- Static generation or server rendering With static generation the HTML is prepared at build time; with server rendering it is produced again on every request — the difference is not speed but how often the content changes.
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