An Eau de parfum smells wonderful and offers more depth and substance than an eau de toilette or cologne. Eau de parfum is luxurious to wear and has a concentration of approximately 12-18%. You should smell an eau de parfum for about 5-6 hours. The combination of perfume oils, longevity and a luscious touch make eau de parfums an extremely popular choice. Spray the eau parfum on warm places and you will notice that the scent lasts longer. Fragrance concentrations may vary by brand. The eau de toilette of one brand may be stronger than an eau de parfum of the other brand.