You can search for the parts of the Quran found in Yemen in the 70's/80's. It's supposed 2 B the oldest now in existence. It is in fact different than the Quran U have. In fact, UR own history states there once were many versions of the Quran, then some leaders gathered them up, picked the version he wanted, then burned the others.
There were 7 different dialects in which the Qur'an could be recited, it's the Qureshi dialect which is the one which is used today, the proper one which was revealed to Muhammad (peace and blessings be upon him).
The others were requested to be burnt by Uthman (R.a) so there would not be confusion if that makes sense.
