The difference between OCD and OCPD is that people with OCD (an anxiety disorder) have compulsions that they must do something in order to avoid or decrease the intensity of obsessive thoughts that are very scary or uncomfortable; whereas people with OCPD (a personality disorder) have more of a rigid, perfectionistic, or controlling style of doing things. OCD has a bigger impact on the person themself, while OCPD tends more to affect other people around them.