WebMD:
Sociopath vs. Psychopath: What’s the Difference?
'Cold-Hearted Psychopath, Hot-Headed Sociopath'
It’s not easy to spot a psychopath. They can be intelligent, charming, and good at mimicking emotions. They may pretend to be interested in you, but in reality, they probably don’t care.
“They’re skilled actors whose sole mission is to manipulate people for personal gain,” Tompkins says.
Sociopaths are less able to play along. They make it plain that they’re not interested in anyone but themselves. They often blame others and have excuses for their behavior.
Some experts see sociopaths as “hot-headed.” They act without thinking how others will be affected.
Psychopaths are more “cold-hearted” and calculating. They carefully plot their moves, and use aggression in a planned-out way to get what they want. If they’re after more money or status in the office, for example, they’ll make a plan to take out any barriers that stand in the way, even if it’s another person’s job or reputation.
PsychologyToday:
Sociopaths tend to be nervous and easily agitated. They are volatile and prone to emotional outbursts, including fits of rage. They are likely to be uneducated and live on the fringes of society, unable to hold down a steady job or stay in one place for very long. It is difficult but not impossible for sociopaths to form attachments with others. Many sociopaths are able to form an attachment to a particular individual or group, although they have no regard for society in general or its rules. In the eyes of others, sociopaths will appear to be very disturbed. Any crimes committed by a sociopath, including murder, will tend to be haphazard, disorganized and spontaneous rather than planned.
Psychopaths, on the other hand, are unable to form emotional attachments or feel real empathy with others, although they often have disarming or even charming personalities. Psychopaths are very manipulative and can easily gain people’s trust. They learn to mimic emotions, despite their inability to actually feel them, and will appear normal to unsuspecting people. Psychopaths are often well educated and hold steady jobs. Some are so good at manipulation and mimicry that they have families and other long-term relationships without those around them ever suspecting their true nature.
When committing crimes, psychopaths carefully plan out every detail in advance and often have contingency plans in place. Unlike their sociopathic counterparts, psychopathic criminals are cool, calm, and meticulous. Their crimes, whether violent or non-violent, will be highly organized and generally offer few clues for authorities to pursue. Intelligent psychopaths make excellent white-collar criminals and "con artists" due to their calm and charismatic natures.