Is Botox or Dysport a good choice for women in their mid-fifties?

Question:
Is Botox or Dysport more advantageous for a woman in her mid-fifties with heavy frown lines?

Answer:
Dysport and Botox seem to do the same thing. Is one more advantageous than the other for a woman in her mid-fifties with heavy frown lines?

We believe that Botox and Dysport are interchangeable.