Is antisocial personality and narcissism the same thing?

No :) Antisocial personality (aka sociopathy or psychopathy) speaks to "superego lacunae" (i.e., a swiss-cheese conscience that knows little remorse / little regret / little guilt), whereas unhealthy narcissism speaks to a more fragile / vulnerable sense of self that is needing constant external reinforcement and stroking. (btw, asocial personalities are simply not that comfortable around people.).
No. The hallmark of antisocial PD is a person with no conscience or sense of right and wrong, is predatory, is at great risk for criminal activity, is opportunistic, cold, and calculating. The hallmark of a narcissist is an immense ego, grandiosity, and self-importance, as well as being entitled. The core of a narcissist is profound insecurity.