Vampire Charm and Charm act differently. Vampire Charm works like an Enslavement, "These commands are absolute and are much more powerful than a Charm spell; instead, it is comparable to an Enslavement. If a vampire tells you to commit suicide, you will do so unquestioningly. If you are asked to cast necromancy, you will" (ARB pg. 125). As such, if the Vampire doesn't immediately tell you differently, you can most assuredly cover your ears, scream out that you are charmed, chug a Purify, whatever.
Charm, however, makes you best friends with the charmer and, as such, you cannot do any of the above and will, most likely, get very irate with anyone who tells you that your new Best Friend is anything but your lifelong soul-mate, "This spell makes the victim view the caster as his or her best friend in the world. No amount of logic or role-playing will convince the victim that they are indeed charmed, and any order given will be justified and make perfect sense in the mind of the victim. The victim will not remember the casting of the spell" (ARB pg. 112).
The downfall of Charm is that, unlike Vampire Charm, it cannot force you to act against Race or innate personality, eg. High Ogres won't Cast Necromancy, Mystics won't take away Free Will, etc.
Charm, however, makes you best friends with the charmer and, as such, you cannot do any of the above and will, most likely, get very irate with anyone who tells you that your new Best Friend is anything but your lifelong soul-mate, "This spell makes the victim view the caster as his or her best friend in the world. No amount of logic or role-playing will convince the victim that they are indeed charmed, and any order given will be justified and make perfect sense in the mind of the victim. The victim will not remember the casting of the spell" (ARB pg. 112).
The downfall of Charm is that, unlike Vampire Charm, it cannot force you to act against Race or innate personality, eg. High Ogres won't Cast Necromancy, Mystics won't take away Free Will, etc.