In Genesis 18, one of the three guests is explicitly Yahweh manifested in human form, who converses directly with Abraham, receives his hospitality, and details the upcoming judgment on Sodom. In Surah 51, they are strictly reduced to created angels (Mala'ikah).
The Dilemma: If the Quran is a Musaddiq (a confirmer) of the Torah, why does it strip the Genesis account of its profound Christophany/Theophany? A polemicist can use this to show that the Quran systematically retrofits historical records to scrub out any instances of God manifesting in the physical world, which directly clashes with the very scriptures it claims to validate.