The main difference lies in their construction and resulting features. The PVC Tarpaulin Kayak (e.g., ADVENTUREX) features a drop stitch chamber solely in the bottom portion, making it lighter in weight and more cost-efficient. On the other hand, the Drop Stitch Kayak (e.g., EXPLORER and VINTAGE) utilizes drop stitch chambers for both the sides and the bottom, offering enhanced strength, durability, and higher weight capacity.