The main difference between types of fragrance lies in the concentration of essences. The order of highest to lowest concentration is first Perfume, second, Eau de Parfum, third, Eau de Toilette, and fourth Eau de Cologne. Perfume is very expensive because it can have up to 40% concentration of essences. Apply an unscented lotion before your fragrance. Oily complexions retain fragrances longer, so if you have dry skin, use a moisturizer first to help lock in the scent