fuzzy is an adjective, it describes a quality of a thing - tuft is a singular noun. A character's fuzz might clump up into tufts, and a character's might be fuzzy, but they are definitely not equivalent terms.
fuzzy means that the character (or something prominent in the art) has an quality of fuzziness to it - tuft means that the character (or something prominent in the art) has one or more tufts.