Lipo on my back, arms stomach and inner thighs - fat transferred to my butt - I really don't see a difference.

This is difficult to answer without pictures. I'm not sure when you had your procedure. It may be too soon to tell what your final results will be, which can take 3-6 months. I do recommend prp and sculptra after fat transfer to help improve final results. If you're unhappy with the size of the transfer, implants may be an alternative. See an expert. Best, Dr. Emer

Honestly, I personally believe 650 mL total will NOT give you that much of a difference whatsoever in a BBL done to both sides of your buttocks. It's difficult to believe that liposuction from your stomach, arms, back and inner thighs did not yield more harvested fat!
Even in a small framed person, I usually recommend 600 mL on each side, knowing that 30% to 40% of injected fat will not survive. I recommend that you ask your doctor exactly how much fat was injected. It just seems that you're not seeing results because enough fat was not utilized.
Best of luck,
Windell Davis Boutte', MD

I am not clear when you had the procedure. It will take a few months for everything to settle and the fat to regraft and grown. I would not judge this for at least 6-8 months