Displacement - These hulls are best for paddling long distances and racing. Displacement hulls have a pointed nose or bow (front end) similar to a kayak and have the ability to cut through water, pushing the water around the nose of the board and to the sides of the SUP for efficiency. In order to push the least amount of water possible these boards need to be long and narrow which makes them faster but less stable.
Planing - Ideal for someone who wants one board that can do it all. These hulls are flat and wide resembling a surfboard, they are designed to ride on top of the water, and perform well in waves. Typically beginners start out with planing hulls because they are stable and versatile for recreational paddling.