There are many different types of face washes for acne available and the best one for you, may not be the best one for someone else. It really depends on your skin type. If you have oily skin, you will need something with an acid to help dry out your skin a little bit.
If you have sensitive skin, you may be better off with benzoyl peroxide. Look at the active ingredients in the wash. Generally all products with the same active ingredient works in the same way so you can use generic products and get the same results.