My understanding is that the material usually referred to as Super White is quartzite which is a natural stone like granite and is dense and hard like granite, unlike marble. It shouldn't be confused with what people refer to as Quartz material which is the family of man-made stones like Silestone, Caesarstone, Cambria, etc. You should ask your stone fabricator or distributor for more information on hardness and what exactly your material is, but generally the quartzite and granites are both hard and less easy to stain or scratch than marble.