[Veen]

One significant difference is automatic back linking (bi-directional linking). Craft looks a bit like Notion but it has some of the functionality of Roam and Obsidian. Plus, decent native apps, which Notion and the others lack.

[pps]

Notion has had backlinks since Sep 2020.

[alireza94]

Craft also supports easy bi-directional linking to blocks, which I assume Notion doesn’t support at this point.