Different frame shape and lower grade of finish, standard configurations only. Different forend latch, I think. Some Trojans did not have the doll's head extension. Barrel steel may be different from other grades, but probably same as V-grade, just different markings to create market differentiation. Chambers were intentionally cut to 2-9/16" for 2-3/4" shells because Parker believed that provided better sealing. Murphy will have more details.