What is the difference between Perfume Oil and Toilette?

The difference between Eau de Perfume(EDP) and Eau de toilet(EDT) in concentration issue. Most of Women's Perfume comes in EDP while Men's perfume comes in EDT Form. The EDT mostly contain 5-10 Pure Oil and incenses(Bottle100Ml-3.4Oz) ,while EDP mostly contain 10-20 pure oil and incenses for the same size. Concentration means in other Word longevity of the perfume .Good EDT last for 4-6 Hours while EDP 6-12 Hours. Both EDT and EDP longevity depend on many different factors like quality of the Oil, nature of the skin and their color at last weather.