Botox, Xeomin and Dysport are all in a class of medications known as neuromodulators. They're used to treat wrinkles, frown lines and crow's feet by causing the underlying muscles that cause wrinkles to relax. As a result, the overlying skin becomes smooth.
The only differences lie in the amount of time it takes to work and the different proteins that can be added to the product. No one product is better than the other, as success is different for each patient.