Once again did not answer the question!
And, which scholar said that "the Quran and Allah existed as two through eternity"? As far as I know, no one said that. What scholars have said is that, because God is supposed to be eternal, and therefore God in His entirety with all His attributes has to be eternal, which means God's knowledge also has to be eternal and since God's knowledge consists of the Qur'an along with all the knowledge about this universe, therefore the Qur'an is uncreated and has existed since the beginning (or throughout eternity). By this understanding, if I'm not mistaken, the Torah and the Bible would also be considered eternal.
Other scholars hold the opinion that even if there was a millisecond difference, God would have existed prior to His knowledge and therefore the Qur'an is created. This opinion has existed since 9th-10th centuries CE, primarily by the religious movement the Mut'azalis. This movement pretty much died out, but the concept of the uncreated Qur'an still exists.