GeoJSON stores full geometry (polygons, lines, points), CSV stores only tabular data with coordinates in columns. GeoJSON is more powerful, CSV is more universal.
| Criteria | GeoJSON | CSV |
|---|---|---|
| Polygons/lines | ✓ | ✗ |
| Open in Excel | ✗ | ✓ |
| Web maps | ✓ | ✗ |
| Simplicity | ✗ | ✓ |
| Attributes | ✓ | ✓ |
For web maps, geometry storage, Leaflet/Mapbox.
For point data, Excel, database import.