Oolong and Darjeeling are two types of tea. Oolong is a semi-oxidized tea that is produced through a unique process of withering the leaves under strong sun and oxidation before curling and twisting. Darjeeling is a type of black tea grown in the Darjeeling district of India. It is known for its light, floral aroma and flavor. Both teas are popular for their health benefits, such as aiding digestion and providing antioxidants.