Voluma is the only filler approved by the FDA for cheek augmentation. Radiesse is used off label for this purpose. Voluma is excellent at lifting with small volumes. It is true that Radiesse is supplied in larger syringes (1.5 cc versus 1.0 cc for Voluma), but Voluma has a 2 year longevity indication by the FDA. This doesn't mean that Voluma will last a full 2 years. In the FDA study, over 50% of the subjects still had correction at 2 years. So it is likely that a touch up of a syringe or 2 will be necessary at a year or so to maintain the results with Voluma. The other benefit of Voluma is that it is a hyaluronic acid product, so in case there was a situation in which you wanted it reversed or removed, there is an injection of an enzyme that can dissolve it, unlike Radiesse. Thus, it could be considered safer, as well.