Scent twins are perfumes that try to come as close as possible to a well-known scent. Many branded fragrances have a cheaper scent twin.
Dupes are almost identical at first glance, but they can also have disadvantages. If you don't want to spend too much money, you can also find a good replacement for classic perfumes online or in the drugstore. This is how much you can save when buying scent twins. The smell of the dupes disappears much faster than the originals.