photoshop brush, a few of the most ambiguous?

Brush some of the fuzzy almost the same effect, no different from a few brush, is the most vague?

Remember is 300, the more The more big fuzzy, the largest only 300 to 0 hardness of the brush the most vague, the hardness of the 100 most clear that any kind of brush can be adjusted from 0 to 100.Hardness adjustment on the line 0 …the most vague, fuzzy least 100 ….Whether you are the same brush, a few bigger ..more fuzzy