You will probably have to call for 2nd level support on that.
I support the J75, but have never used a Versant, but I believe the Versant line uses a newer toner that melts at lower heat and has smaller particles in order to achieve higher resolution. And that toner itself does not support the Gloss settings of the J75 toner.
But you would need to get that confirmed via 2nd level support for that product/ product line. They typically would have a decent workaround to achieve consistency to the J75 output.