Roam vs Obsidian
Roam Research is the original networked thought note-taking app. It is a note-taking powerhouse with excellent note-linking abilities. You can easily build and navigate whole knowledge bases with Roam.
Obsidian is a Markdown-based networked note-taking app similar to Roam Research. It is faster than Roam, and has a way better mobile app. That said, it is much weaker than Roam in a other areas such as block references and linked references.
Fan of note-taking apps? 🤔
Maybe Paper is what you're looking for.