Oh man, FFV ranks as probably my second favorite in the series, but to reply to Elpizo's remark hinting the differences between the versions...simply put: The story is the same. I own FF Anthology, have beat FFV, and I'm a story guy. No need to buy the same game AND a GBA for a game I'm already in love with and don't need more convincing.
Plus, I can spend my money elsewhere rather than having 2 FFV games.