Schizotypal personality disorder and schizophrenia share some characteristics, but one characteristic they do not have in common is

The answer to this question would be:D. delusions of grandeur.

Characteristics that are unique in schizophrenia is that they have delusion and hallucination. In schizotypal patient, they have a strange idea and behavior. Sometimes they also have an idea of reference. note that the schizotypal is a personality disorder so it is on a different axis than the schizophrenia.