s there a difference between Vac-Thermoform packaging & Vacuuforming?
Basically no.
“Thermo” simply means heat; all “vacuum-forming” processes require heating thermo-plastic material to form them. Thermo-set plastics (of which epoxy is one) do not “melt” when heated, they may distort to a certain degree, but they never become “formable”.
But there are a lot of variations on the process, especially in the area of “packaging”, versus, “product” molding; material gauge (thickness), cycle times, and auto-trim capabilities being the notable differences.