The name is misleading, the grippers are just softer urethane and are more useful in bowls and such. They slide, and grip. You may also like a stickier feeling wheel. Sliders have harder urethane which is a bit faster, but still allows you to do tricks like smiths and sliders where your wheels are needed to slide. They also flat spot a lot less, making them good for the impacts of street riding. Sliders still grip but its more of the feeling you want or the style you do.