It would be great if the virtual copy can also be stored in an other side amp file like for instance DSC09009.xmp for the master and DSC09009-1.xmp for a virtual copy.
This way one could share the different develop setting and also be able to sync a folder previously 'developed'/treated with an other catalog.
I now they are some workaround with developments versions but is not practical.
Develop version are stored in the xmp but not the virtual copies