User blog comment:WeissSchnee/New Information/@comment-3146930-20130824015805/@comment-3146930-20130824031938

I'm still somewhat trying to see how accurate the trailers are to the series. But anyway, this is how I'm trying to spot the differences between Aura and Dust:
 * Dust seems much more nature based. Normally someone using Dust will use some kind of Elemental attack (Ice, fire, lighting).
 * Aura only seems to affect the person using it. So for example, Ruby's super speed, Yang's rage-mode, and Lie using it to increase the force of his strikes would be seen as Aura.
 * Dust seems to have magic circles when being used. During Glynda's fight with Crimson, any time they used Dust, a magic circle appeared. These circles could be how people originally learned to control Dust.