I am ordering Super Sauce and transfer film to use with my high school class. I wish to know the difference between the gloss and matte SuperSauce. Is it just the final surface on the paper?

Either one will work on all surfaces.  For transferring to papers I prefer to use the matte. For transferring to metal I prefer to use the gloss.   Use the Matte version on stone paper to avoid glossy spots outside the image area.