Versus is the official spelling on merchandise. In addition going by the katakana ドナテロ・ヴェルサス (Donatero Verusasu) indicates that his name is properly spelled Donatello Versus rather than Donatello Versace, which would require it to be spelled ドナテロ・ヴェルサーチ (Donatero Verusaachi), indicating that Versus is not only the official name but also the more accurate transliteration of his name.