Super White is quartzite. Technically, quartzite is closer to marble than granite in classification (since they are both metamorphic, and granite is igneous). So that's why people often say it is more like marble.

However, for all practical purposes (i.e. as countertops), quartzite is as hard and durable as granite. I have seen rare instances of etching or staining, but since you don't usually find granite in this color, that's understandable. If you keep it sealed and don't leave tomatoes and lemons etc sitting juicy on the counter for hours and hours at a time, you will have no problems. We install it all the time (for quite a few years now) , and have never had staining or etching on this stone.