Islam Critiqued seeks the true canon; 1924 Quran edition corrected variant qurans?

In answer to the video "Miraculous Preservation of the Quran: Burying the Myth"

The "Quran of Cairo" uses an elaborate system of modified vowel-signs and a set of additional symbols for minute details and is based on the Hafs reading. This edition has become the standard for modern printings of the Quran, since 1924 when the printing house was established in Cairo. Before that point, the Quran was printed in Istanbul until it ceased being the capital of the caliphate. Again, this is not a different Quran, but one whose Uthmanic rasm was improved over several years until 1924, so as to minimize scribal errors. Many such errors were detected in Quran copies which the Egyptian government used to import prior to 1924. These errors, in modern copies -not in ancient manuscripts-, are irrelevant in determining the authenticity of the Quranic text since they were pointed, and the copies destroyed by sinking them in the Nile river. 

 There are no differences between the Quran printed in Cairo and the ones printed all over the Muslim world. The Cairo edition is based on the well known hafs reading of the prophet himself. There was never any canonization process and debates, revisions over what the Quran's contents had to be. This is exactly what occured with the Bible with different canons over time. Nothing in the history of the Quranic text, even by the furthest stretch of imaginaton and revisionist fantasies, can be compared to the tumultuous 400 years following Jesus' death, which marked the canonization process of the Bible.