Very good question. Both the Sciton Erbium and ResurFX are excellent devices for rejuvenating the skin and addressing a variety of specific concerns. The Sciton erbium has a wider range of possible depths, from very superficial refreshment to reduction of deep wrinkles, while the ResurFx is non-ablative and allows for fast healing. As long as you are working with a board-certified cosmetic dermatologist who has multiple devices to choose from, you should receive a very good outcome. I would be more concerned about the expertise and experience of the provider than the actual device used, as a skilled cosmetic dermatologist will have the knowledge to tailor your treatment to your precise needs. Good luck to you!