The only difference is languages which contained is not same, VOCAL 20A+ contained the following languages,English, German, French, Spanish, Italian, Portuguese, Dutch, Greek, Turkish, Arabic, Persian, Russian, Chinese, Japanese, Korean, Thai, Vietnamese, Indonesian, Malay, Tagalog-Philippine, most of those languages belong to asia, whereas VOCAL 20L+ contained the following languages, English, German, French, Spanish, Italian, Portuguese, Dutch, Czech, Polish, Hungarian, Slovakian, Romanian, Greek, Turkish, Arabic, Persian, Russian, Chinese, Japanese, Korean, most of those languages are used by european.