The latter snore at night and then lack energy during the day, whereas the former can be wide awake and then suddenly fall into REM and experience hallucinations. In the past narcoleptics were mistakenly regarded as suffering from mental illnesses or as being feeble minded.
前者夜間打鼾，白天精神不濟；後者則會由完全清醒的狀態，突然陷入速眼動睡眠，出現幻覺現象，過去經常被誤診為精神疾病或弱智者。