The difference is that they are suitable for different skin types. Clinique Water No. 2 is suitable for combination to dry skin, it can improve the skin's absorption, and it does not contain salicylic acid, which is less irritating to the skin, while Water No. 3 is suitable for combination to oily skin, and salicylic acid has the effect of exfoliating cuticles. , can clean the skin epidermis more effectively.