Think of them as starting from the same jello like substance and then pushing that jello through a strainer. If you use a pasta strainer then you get perlane. If you use a sifter for powdered sugar you get restylane. Forgive the food analogy but this seems to make sense to eveyone. As to what is best used in which location will depend on your skin thickness and type. A dermatologist with experience with fillers will be able to help you decide. Good luck





