Is the Qur’an today different than what it came to Muhammad?

As for the order of the Qur’an, chapters and verses, no one says that they are the same as it came down except an ignorant person. As for the difference in the order of the chapters, it has been confirmed/proven with all the Muslims that there is more than one order at least according to the Masahif (copies of Qur’an) of the companions. And you can revise the books which addressed the history of Qur’an and what had been narrated about that