The two overlap significantly, but they’re not identical. Good SEO — clear, well-written, factually specific content with strong structure — also tends to perform well in AI contexts. But AIO goes further, focusing on named entities, conversational content, semantic clarity, and trust signals that AI systems use when deciding whether to cite or recommend a source. Think of AIO as SEO’s more sophisticated sibling: it builds on the same foundations, but with a different reader in mind.