A workaround features could be to
Capability to download a settings file.. maybe an xml or something like that of a sketchfab scene's lighting and material library.
that way when we re-upload a identical model for comparison, we can just "load" the xml file and voila have the same setup applied!
after we upload a model, under each tab (well the first 3 anyway)
we get a "load from other sketchfab" option .. that lets us browse our own previous model library.. (possibly search by name) and load settings from that previous model. (transferrable parameters will only be lights and materials.. probably not textures everytime)