One difference is that sites like thingiverse allow the parametrization of OpenSCAD projects right on the site, so downloaders can customize their STL without n

One difference is that sites like thingiverse allow the parametrization of OpenSCAD projects right on the site, so downloaders can customize their STL without needing to run OpenSCAD themselves. To the best of my knowledge, there is no such ability for FreeCAD. For one of my projects, this seemed to be enough of a benefit that I redid my original FreeCAD design in OpenSCAD for eventual uploading.