Salt scrubs are generally more abrasive because of their sharper edges and, therefore, do a better job at smoothing the rough skin of the body. What really separates salt scrubs from sugar scrubs is that they offer therapeutic, mineralization benefits.
Sugar scrubs are gentler than salt scrubs because the granule is round and therefore doesn’t have any ability to “cut” the skin. It’s a far better choice for sensitive skin types and the only choice for the face. Sugar granules dissolve more easily in hot water, and they are less abrasive than salt scrubs.