An interesting match up in Round 1. Botox reduces the appearance of wrinkles and fine lines. Voluma is an injectable gel FDA-approved for correction in the cheek area for age-related volume loss and cheek enhancement for all adult ages.
They're both fillers, but that's where the similarities end. Restylane represents a whole family of fillers, each designed for specific areas of the face. Sculptra results appear gradually over time, but last a long time.