Can anyone tell me the difference between the two? I had Vasershape on my stomach and butt and it did make some difference, but I'd love to do the front of my thighs and maybe more on my stomach. I don't so much need to get rid of fat, just firming up the skin and dimples (I'm 5' 2", 100lbs, 42yrs old). But now I'm confused whether I should go with Vasershape or Exilis? What is the difference?