From: Diffen.com

Psychopathy and sociopathy are both anti-social personality disorders. While both these disorders are the result of an interaction between genetic predispositions and environmental factors, psychopathy leans towards the hereditary whereas sociopathy tends towards the environmental.

Psychopaths are born with temperamental differences such as impulsivity, cortical underarousal, and fearlessness that lead them to risk-seeking behavior and an inability to internalize social norms. On the other hand, sociopaths have relatively normal temperaments; their personality disorder being more an effect of negative sociological factors like parental neglect, delinquent peers, poverty, and extremely low or extremely high intelligence.

Anti-social personality disorder results in extremely violent acts. Though psychiatrists often consider and treat sociopaths and psychopaths as the same, criminologists treat them as different because of the difference in their outward behaviour.

Comparison chart

Despite "their extensive criminal histories and high recidivism rate", psychopaths showed "a great proficiency in persuading parole boards to release them into the community." It is purported that high-psychopathy offenders (both sexual and non-sexual offenders) are about 2.5 times more likely to be granted conditional release compared to non-psychopathic offenders."Source: Wikipedia

Terrorists are sometimes called psychopaths, and comparisons can be drawn with traits such as antisocial violence, a selfish worldview that precludes welfare for others, lack of remorse or guilt, and blaming external events. However, such comparisons could also then be drawn more widely, for example to soldiers in wars. In addition, it has been noted that coordinated terrorist activity requires organization, loyalty and ideology; traits such as self-centeredness, unreliability, poor behavioral controls, and unusual behaviors may be disadvantages.

Recently Häkkänen-Nyholm and Nyholm (2012) have discussed the possibility of psychopathy being associated with organised crime, economic crime and war crimes.

It has been speculated that some psychopaths may be socially successful, due to factors such as low disinhibition in the triarchic model in combination with other advantages such as a favorable upbringing and good intelligence.

Psychologists Fritzon and Board, in their study comparing the incidence of personality disorders in business executives against criminals detained in a mental hospital, found that some personality disorders were more common in the executives. They described the personality-disordered executives as "successful psychopaths" and the personality-disordered criminals as "unsuccessful psychopaths"Source" Wikipedia