Fraxel is a name brand, and has several versions:1. Fraxel- Non-Ablative (non-wounding):a)Dual: Effectively targets tone, texture and more superficial signs of aging, actinic keratosis and pigmentb)Restore: Penetrates deep into the skin layers, specifically targeting concerns such as wrinkles or acne scarring2. Fraxel Co2- Ablative (wounding):a)Repair 600m: Treats fine lines, age spots and sun spotsb)Repair 135m: Used to target deeper wrinkles, tighten skin and remove years from your appearanceIf you have sun damage and deep wrinkles I would suggest Fraxel Repair 135m to face and 600m to neck. Both versions are Co2 but the 135m goes deeper so it is more appropriate for the face. There is a big price difference because the different technologies have different costs associated with them and also thenon-ablative procedures require multiple treatments to be most effective.Consult with a Board Certified Dermatologist to see which option would be best for your skin type.