@babylove - Both the glycolic and salicylic peel are good at treating acne. Generally the salicylic acid controls acne better than the glycolic because it has the ability to penetrate the oil follicles where the condition starts.
Lighter glycolic cleansers are ideal for every day use as they are less abrasive than the salicylic acid peels. Both of the acids can be found in numerous skin treatment whether over the counter or by prescription.
However I read somewhere once that the glycolic acid had not yet been approved by the FDA. I don't know if it's true or not but it can be just as effective in treating acne as the other acid peels.