Will Belllafill or Radiesse deliver better results? Hoping to enlarge butt and hip dips. 27 y/o female, previously had BBL.

Hello, I am a 27 years old Asian female. I am petite and have small bones. I got 2 rounds of bbl in the past but the fats don’t stay very long. I’ve recent lost 12 pounds, which significantly reduced the size of my buttocks. I'm considering getting filler, but I'm not sure if Bellafil or Radiassee filler is better.