def diff_index(self, index1, index2):
        """
        Finds the difference between the indexes index1 and index2.

        Compares index1 with index2 and returns True if there are any
        differences or False in case there are no differences.

        :type index1: Index
        :type index2: Index

        :rtype: bool
        """
        if index1.is_fullfilled_by(index2) and index2.is_fullfilled_by(index1):
            return False

        return True