Craft usually describes flower produced with more direct human attention. Commercial usually describes flower produced under stronger pressure to scale.
That is the useful starting point, not the full answer. Craft tends to suggest smaller runs, more deliberate handling, slower finish decisions, and a product identity tied to expression. Commercial tends to suggest larger systems, standardized workflows, repeatability, and broader market coverage.
Neither label settles quality by itself. A craft label can be weak if the process is sloppy. A commercial run can still produce competent flower if the system respects maturity, drying, and cure. The real separation appears in what the process refuses to compromise first.