In Obsidian, you manually create [[wiki-links]] between notes. In Synap, AI detects connections between your captures automatically — who wrote a paper, what project an idea belongs to, which tasks block each other.
Obsidian treats everything as a markdown file. Synap knows that a person, a task, and a research paper are different things — each with the right properties, typed relationships, and queryable structure. Same ownership. Much more power.