eau de toilette perfume difference

What is the difference between eau de toilette and perfume?
things are the same? or different? thanks
Parfum (perfume) is stronger than the eau de toilette. perfume, also called extract or extrait perfume, can include 15-40% perfume concentrates. This is the purest form of scented product and is the most expensive as a result. Eau de parfum contains about 7-15% perfume concentrate. This is the most popular and common form of perfume. Provides a fragrant long duration and usually do not cost as much as extract perfume. Eau de toilette has around 1-6% perfume concentrates. This makes a sweet scent that will not stop as long as more intense versions. Originally intended to be a refreshing body splash to help people wake up in the morning. Eau de Cologne are sometimes used interchangeably with the term eau de toilette. However, the mixture began as the name of a fragrance light, fresh citrus blended with oils and was made popular by Napoleon. Some perfumes have today a version of this called eau fraiche.