what is the difference between the regular one, the deep and the gentle?

The regular would be more for normal skin, which I absolutely love this one. If u notice the colors of each line (green is more for oily skin or acne prone or more needed work, purple is more for dry but this product self explain, [gentle] so for sensitive skin, much more needed gentleness and moisture, and the white is more for normal skin or if ur skin can tolerate, (as white has a lot of different products) and of course the calm one is for redness and such. 🙂