Perfume oils and perfume sprays differ mainly in their concentration and application method. Perfume oils contain a higher concentration of fragrance oils compared to perfume sprays, making them longer-lasting and more potent on the skin. On the other hand, perfume sprays contain a mixture of fragrance oils, alcohol, and water. The alcohol helps to disperse the fragrance and evaporates quickly upon application, leaving behind the scent. In summary, perfume oils provide a more intense and long-lasting fragrance experience, while perfume sprays offer convenience and broader coverage. The choice between the two depends on personal preference and desired intensity of scent.