[quote=@Wayward]
<Snipped quote by ianzerep>

What is said difference? 

Totally high in interest in this, by the way. 
[/quote]

Not the GM, but I'll try to answer. Soul would be like your mind. Spirit would be more like motivation in the roughest sense. For example, if one had the Existence Aspect and controlled one's spirit, they'd be changing their motivation to do things. Their desire to live and/or do other things. Control over soul would be more akin to mind control, directly affecting their personal views, wants, needs.