Dear Friends,
Everyone can make stories but no one can produce authenticated copy with differences even by the major sects who differ in their ideology very much but still they do not differ in the manuscript. This is the simple fact and to me a miracle. Believe it or reject it.
Regards.
Differences are not found because the Qur'an was not written down immediately. It was memorized by Mohamed and his early followers. Even today we have people who have memorized the entire Qur'an and can recite it perfectly. Even if every copy of the Qur'an is burned, we have these people who have memorized it. This is the miracle and the beauty of the Qur'an. This cannot be said of the Torah or the Bible. We do not have Jesus' words in the original Aramaic because no one painstakingly memorized his words. The Qur'an is something different. God's words through the angel Gabriel to Mohamed were so important and miraculous that they were memorized. I have met Westerners who could memorize something after hearing or reading it once. This is a gift that I don't have. In graduate school there was a fellow chemistry student who could quote from any page of a chemistry text that he had read once. The professor would ask a question and if no one else answered, this guy would rattle off something that would start out like "on page 262 in the fourth paragraph ..." It was uncanny, but these abilities do exist and the fact that we have these identical copies of the Qur'an from various sects all agreeing with one another points to the fact that there was no original copy which has been lost. The Qur'an lives in each generation where there are people who memorize it in its entirety.