The mechanics overlap more than the marketing suggests. Both reward content an engine can actually extract: clean HTML, real structure, explicit machine-readable facts (schema.org), fast delivery, and no crawl blocking. If a page is invisible to a crawler it is invisible to both.
Where they part ways is the unit of victory. In SEO you want position; the outcome is discrete and comparatively stable. In GEO you want inclusion in a synthesized answer, and the outcome is a probability: the same question can name you in one run and omit you in the next. That single fact changes measurement, reporting and how you judge whether work paid off.
They also part ways on corroboration. Classic SEO leans heavily on links. Answer engines lean on whether independent, trustworthy sources say the same thing about you — reviews, comparisons, mentions, structured entity data that resolves cleanly. Being an unambiguous entity that several sources agree on is a GEO lever with no exact SEO equivalent.
Practically: keep doing technical SEO, because it is the substrate. Add GEO on top — entity clarity, extractable answers, corroboration, and honest per-engine measurement of whether you actually show up. Treating GEO as a replacement for SEO usually means abandoning the foundation the AI engines also depend on.
