Chances are, unless you have been living under a rock (or not an acne sufferer), you have heard of X Out and Proactiv. Both products are made from the same company, but have entirely different targets. X Out is targeted towards teens, while Proactiv is for a more mature audience.
I used to be an acne sufferer, (I am 42 now), and I used Proactiv when it was in it's infancy.
Now, there are so many different products from this company that it can be hard to keep up with them all.
My daughter, who is almost 16 now, has suffered from break-outs since she was 12. She uses teen version X Out to clear up her skin.