I did a combo of botox and dysport 5 days ago. So far, I'm very happy with both. I chose dysport for the forehead area only because of concerns about spreading. The same evening, I felt weakness in the forehead. By the next morning the area injected with dysport was wrinkle free. I did have a killer headache the following day, but it was gone by the evening.
I chose botox for the glabella and crows feet areas. I started to see results for those on the third day. I'm still seeing daily improvements in those two areas.
I can say for certain that dysport did take faster for me than botox. I'm still leery of using it all over until its been out a little longer.