M.P.
I suggest that thousands of dollars can be spent better when used for life style changes. Yes, you will have sagging skin that takes time for your body to absorb unless surgery to remove it is a part of the plan. Also, your body will build new fat unless you change your eating habits and get more exercise. And where you increase fat deposits is also caused by genetics.
I have a friend who had weekly treatments to reduce fat in her abdomen. I don't know how the process worked. I do know that several months later her body had the same contours including abdominal fat. The treatment cost thousands of dollars.
I have known women who lost weight but still had saddle bags.
Good that you're asking about the two different procedures. I suggest you also need to know what the outcome is several years later.