What's worse - being mentally ill / insane, or being mentally retarded?

What mental disorders are the worst? Mental illness (Insanity/Lunacy/Madness), or Mental handicap/retardation?
Mental Illness / Insanity (Neurosis, Schizofrenia, Psychopathy)
Mental retardation (Cretenism, Moronism, Idiotism)
Don't know/see the results
Select gender and age to cast your vote:
What's worse - being mentally ill / insane, or being mentally retarded?
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