One reciter reads in the morning and another in the evening. Their voices arise at different times and cease. Likewise, written words appear on particular sheets at particular times; the paper and ink are created things.
Recitation is the reader’s act. Writing is an act and a material inscription. Audible sound is an event perceived through hearing. Their temporal character is distinct from the eternity attributed to divine speech.
A genuine attribution of the Qur’an to God does not transfer every material feature of its created medium to the eternal attribute that the medium signifies.