It depends on the model and where your boat is
made. For example the C320 which is made in Woodland Hills Ca, has a molded in diamond pattern. The Boats made in Largo Fl, like the C380 have a molded in random sand pattern. Many people mistake this for a painted on non-skid. But according to Warren Pandy in Largo, this is actually a difficult and expensive way to make the deck. Evidently it take a lot of man-hours to design and make this mold. He also mention that because it is a random pattern it is easier to repair, especially a larger area.