CACI vs Radio Frequency for face?

I am 62 and just had Radio Frequency done on my face and I am thrilled with the results! I want to go back to have my neck done, but my friend said that RF reduces fat and that is why they use it for cellulite. I do not want to lose any fat in my face - is this true? Could someone please tell me the difference between the two. Also, the pros and cons of both. I live in England so maybe something is available to you and not to me.