All three of them contain similar ingredients for the same effective anti-aging and brightening benefits. However, they differ in the percentage of ingredients used to emphasize different functions.  All-in-One Essence Original is for people with dry skin and focuses more on anti-aging and wrinkles.  All-in-One Essence Light is for people with combination skin and focuses more on tightening pores.  All-in-One Essence Oil-free is for those with semi-dry to combination skin who want a non-oily finish. But just because it’s oil-free, it doesn’t mean it’s not as moisturizing. It’s perfect for women and men to use during summertime.