The main difference between all mountain and piste skis is the width of the ski. All mountain skis are typically wider than piste skis, which makes them better suited for powder skiing or skiing in deeper snow. Piste skis are narrower and have a shorter turning radius, making them better for carving turns on groomed slopes. Both types of skis can be used for off-piste skiing, but all mountain skis will provide more floatation in soft snow.