Actually, I don't like those terms very much myself. It started as a joke between Croak and me and then it just took off. It bothers a lot of people and confuses new vapers--as evidenced by this thread's OP. Seriously, the real distinction, IMHO, is between the mouth-to-lung, usually lower-wattage and somewhat restricted-airflow style of vaping (closer to the way we used to smoke) and the direct-lung, high wattage, big-air style.
That said, many vapers often switch from one style to the other, or some in-between variation/hybrid of the two, depending on their mood or need. I've tried both styles myself, at different configurations, wattages, amount of airflow, etc., but my sweet spot is always mouth-to-lung, low(ish) wattages, moderate air.