The most significant difference between a body scrub and a face scrub is the dosage or intensity of the scrub.
The skin on the face is much more sensitive than the skin on the parts of the body that are usually treated with a peel.
Therefore, a facial scrub must have "weaker" ingredients in various aspects, depending on the type of scrub.
This can concern the grain size, for example - by using smaller, finer grains than in a body scrub.
Since body scrubs and face scrubs generally only differ in the dosage, but not in the type of composition, a scrub that is actually intended for the face, for example, can also be used on more sensitive skin areas on the body.