No it's not the same
المعجم فيه معاني الكلمات العربية ومرادفاتها
القاموس وهو الكلمات العربية ومعناها بلغة أخرى أو العكس
Mo'jam is only for Arabic - Arabic words, it defines the meaning of Arabic words through Arabic explanation
Qamous, is for Arabic - English dictionary (for example). it's the meaning of Arabic words in other languages or the opposite.