I think they are much of a muchness. The results depend on whether you’re the right kind of patient for it, and to some extent on the skill of the practitioner. All these types of radiofrequency microneedling can give great results.  I have yet to try Morpheus8 or Profound RF. Each practitioner I have spoken to about their choice of machine swears that theirs is the best, which leaves me none the wiser! Here’s the Secret RF video, if you want to see what treatment looks like.