So, what do you know about joint and sole custody? Here are some details that anybody would want to know more especially those who are going through a divorce. So, note that whenever possible the court would grant Joint Custody. It enables you to split both time and expenses between the parents equally. On the other hand, sole custody is awarded when there is evidence of physical, alcohol, or other substance abuse. Sole legal custody is rarely awarded. That’s the difference between the two for your legal information.