Oily skin is caused by an over production of sebum (oil), and is more prone to blemishes, requiring more cleansing and exfoliating. The goal with this skin type is to use products that balance the skin's oil production and exfoliate the skin to reduce excess oil and dead skin buildup in the pores.
Acne is a disorder of the oil glands, caused by a buildup of dead skin cells, excessive oil production, and bacteria trapped in pores. This leads to inflammation and eventually breakouts. The goal with this skin type is to use products that deeply clean the skin to reduce excess oil buildup, exfoliants that help to unclog pores, and calming and soothing products to ease inflammation.