With Quartz countertops, you get the look and feel of granite, but receive greater strength and the benefit of it being nonporous and maintenance free. Just wash it with warm water, and use a mild soap if desired. Quartz is stain resistant and never needs sealing or reconditioning.
Granite is a porous stone and needs to be sealed regularly with a chemical treatment. It can absorb liquids and food, risking potential staining and bacterial growth within the countertop.