In Logseq, everything is a bullet list. Obsidian supports a fuller range of Markdown formatting.
The daily journal is more prominent in Logseq. You can get it in Obsidian through an extension, but it does not have the same “core feature” status that it has in Logseq.
Obsidian has a mobile app.
And: Obsidian uses - [ ] and - [x] for todos, like almost all Markdown-based tools except Logseq. This is my #1 LogSeq feature request.