Something that should be verified is whether the subject isn't capable of empathy and emotions or assume it as a way to cope with the pain implied by their existence.
With Psychopathy someone is born without the capacity for empathy with no environmental trigger necessary to "activate" psychopathy.
With Sociopathy it's generally that childhood trauma "triggers" the lack of empathy.
In both cases, the manifestations of the disorders (manipulation, ego-centrism, grandeur, deceit) are there to cope with the lack of empathy and connection with other people.
With Psychopathy someone is born without the capacity for empathy with no environmental trigger necessary to "activate" psychopathy.
With Sociopathy it's generally that childhood trauma "triggers" the lack of empathy.
In both cases, the manifestations of the disorders (manipulation, ego-centrism, grandeur, deceit) are there to cope with the lack of empathy and connection with other people.