Restylane and Perlane
As has been stated here by many, Restylane and Perlane are both hyaluronic acid fillers made by the same company, Medicis. Juvederm is hyaluronic acid filler made by a competing company, Allergan.
In general, Perlane is a thicker product used for deeper fill and "adding volume" to the face, whereas Restylane is used more superficially in finer lines. Restylane is recently FDA-approved for lip augmentation as well. I have used Restylane and Juvederm in lips and I find they are...