The two consortia were in the DSM game immediately. Restarting consortium production was one of the chief reasons behind the trainer program, after all. Shortly thereafter, they were making K98ks and other war materials. They went on to RWM contracts which were more profitable for them.
Don't know that I would say there were two distinct variations in "Greenheart" DSMs; it does appear as if Foss may have assembled some of the first ones at Venus prior to handing that job to Weihrauch. Marking location on guns was not consistent with early production guns. After the consortium quit making these (first makers were Mauser, Walther, Erma, Simson, Menz, and the two consortia), Weihrauch continued producing in Zella-Mehlis until signing a contract for the KKW. They were required to "cease and desist" on DSMs or parts, with that act. Anyway, with about 6500 total Greenheart-marked DSMs, they are a precious piece of history.
Steve