Since everyone gets confused and mixed up about the difference, and some believe theres no difference, here you go: http://psychcentral.com/blog/archives/2015/02/12/differences-between-a-psychopath-vs-sociopath/
I trust Psych Central with my life to be honest.
Summary
Psychopathy and sociopathy are different cultural labels applied to the diagnosis of antisocial personality disorder. Up to 3 percent of the population may qualify for a diagnosis of antisocial personality disorder. This disorder is more common among males and mostly seen in people with an alcohol or substance abuse problem, or in forensic settings such as prisons. Psychopaths tend to be more manipulative, can be seen by others as more charming, lead a semblance of a normal life, and minimize risk in criminal activities. Sociopaths tend to be more erratic, rage-prone, and unable to lead as much of a normal life. When sociopaths engage in criminal activity, they tend to do so in a reckless manner without regard to consequences.