What is the difference between depressive personality disorder and dysthymia?

On Quora One answer by Puneet Prakish Trainee Orthopedic Surgeon " No difference. Dysthymia was known as depressive personality disorder in 1940 and the term changed to neurotic depression in 1960. Since 1992 the term dysthymia has been used and it is defined as subsyndromal depressive symptoms for 2 years." Another answer was by Carly Hellieson Studied at New College of Florida "Depressive Personality Disorder is an unofficial diagnosis, and is not recognized as an actual condition among psychologists. Dysthymia ia a low-level, on-going form of depression. It is less severe/acute than the type of depression experienced in a major depressive episode, although such an episode can occur with someone who has dysthymia. Someone who has this disorder generally doesn't have a large range of "ups and downs", but instead tends to have a baseline mood that's lower than most people( baseline mood is "down", "blue", "meh", or "just okay", but rarely ever "great"). In the diagnostic manual, the DSMV, this condition has been combined with chronic major depressive disorder, now considered Persistent Depressive Disorder".