Bellafill vs Sculptra cost... which costs more and how many vials would I need for hip dips? (photo)

I just bought Sculptra vials for hip dip correction but now im finding out about Bellafill so I guess once my sculptra wears off ill go with Bellafill... what is the cost per vial and would you need the same number of vials as Sculptra or more for hip dips? I can see that the bellafill vials are much smaller... I have added a pic (2 vials on each side, 2 treatments total of 8 vials of sculptra purchased)...thanks!