The Green Biscuit Snipe Puck is designed for shot training, in that it has been engineered to withstand the impacts from shooting.  Your surface doesn't have to be perfect for the green biscuit, but the better the surface the better the performance.
 
The second puck is the Original Green Biscuit. This puck is the quintessential stickhandling/passing puck. You can use it on any surface, making it a great training tool for individual work at home, or in a team setting for off-ice workouts.