I've compared all the different fractional and fractional CO2 lasers. Fractional CO2 lasers work better than the older Fraxel lasers. There are many different brands of fractional CO2 lasers and they are not the same nor produce the same level of results. Some fractional CO2 lasers are definitely more effective than others. The most powerful fractional CO2 laser is produced by Lumenis and they have several different types: ActiveFX, DeepFX, PigmentFX, TotalFX, MaxFX, and AccuPulse. The DeepFX is the best for acne scarring because it has the deepest penetrating laser beam and highest energy. The results can be improved by combining ActiveFX with DeepFX which is called Total FX. The AccuPulse is the cheaper version of the ActiveFX/DeepFX but is lower power and not as versatile as the ActiveFX/DeepFX. The Fraxel re:pair is a much lower power fractional CO2 that does not produce the same level of results as the DeepFX. There may be slightly more intense redness with DeepFX compared to Fraxel re:pair. The cost is comparable. Many of the other competing fractional CO2 lasers are much lower power and less effective than the Lumenis DeepFX/ActiveFX/TotalFX.