Super Gloss and Spot UV are both coatings that leave a glossy finish.
The main difference is the application - Super Gloss is applied throughout the entire surface and Spot UV is applied to specific areas only. See: What is Spot UV?
Super Gloss is available on a variety of stocks via our Digital Output and Premium Offset services. Spot UV is only available on 14pt Semi Gloss or 16pt Smooth Matte Laminate via Offset output.