Like I said yesterday, the Red Mage is able to cast both white and black magic, and he can deal out decent physical damage, but he doesn't have access to some higher-level spells; the White Mage casts white magic, which mostly focuses on HP-restoring and status-healing spells, but she's pretty weak physically; and the Black Mage casts black magic, which mostly focuses on offensive, damage dealing spells, but he's also pretty physically weak.