Never use any preposition apart from as following the same in sentences like these. Will not say, as an example, 'He was not the same like one other boys'.نَفْسنَفْس الشَّيْءنَفْس الشّيء، لم يَتَغَيَّربالطَّريقَةِ نَفْسِها، الشَّيْ نَفْسهمُتَشابِهBonjour Je l’ai