ActiveFX laser resurfacing treats the skin with lots of tiny laser spots. DeepFX laser resurfacing is actually a version of the same treatment but the laser spots are much smaller and go much deeper than the ActiveFX.
In summary, the “DeepFX” spot size targets deeper lines, wrinkles, and scars, whereas the “ActiveFX” spot size targets pigments, superficial lines. By combining the two (TotalFX) you can achieve dramatic results.