Both models have the advantages of the catamaran hull such as early planing, stable, fast, etc. Both models have the innovative transom in aluminum. The difference comes to the bow where WS-C has an open liner which means a very easy landing towards rocks, beaches, piers, etc. but also very easy to get out of the water. WS-S has a more traditional tube around the entire boat, however, it is tapered in the bow, which makes it easy to step in and out. Most often, it is the personal choice and even one’s own needs that determine the choice of model.