What fillers to chose for my acne scars and chin?

I will use it for acne scars and chin filler. My doctor said he has 2 filler options. 1st filler is expensive because it is branded as face filler and it is only 1ml. The second filler is branded as body filler (for breasts, butts, etc) and is cheaper because it comes in bigger ml. My doctor said that the second option is the same thing but has more HA cross-link rate and can cause swelling on the face. The brand is GANA MHS and GANA MH (body) if that matters. Can you give me advice? Thanks!