Which is More Effective for Acne Scars: Affirm Multipulse or Lumenis Ultrapulse (Total FX?)?

You want to make sure that you are using a co2 laser that is not continuous but based on a pulsed approach that delivers exact quantities of energy. This will avoid damage to surrounding structures. The ultrapulse is such a laser. But you should consider a multilayered approach with the co2 laser resurfacing. see video

I was for years a big believer in CO2 laser resurfacing for acne scars. For the past 8-9 months, I have been using the palomar fractionated combo laser treatment. Advantages over CO2 are less risk of scarring or pigmentation changes, quicker recovery, ability to perform the procedure with just a topical cream on for anesthesia. Many lasers work for acne scars. I believe the palomar system gives very good results. It also is the experience of the operator of the system, the degree of scarring... more

A surgical maneuver that can remove the scar would be the most effective way to treat acne scars. CO2 laser or Phenol peels as well as surgical removal of the scars with dermabrasion are examples. Anything less will only may improve the scar by 30-40 %.