First of all, there is no Shia-Sunni in Islam. You will find nowhere in Islam.
And there’s no sect in Islam. Let me brief it in a few words.
The Prophet Muhammad (peace be upon him) said:
“My ummah will divide into 73 sects, all of them will be in the Fire except for one, and that is the Jamā’ah (those who follows the prophet and companions).” It was said, “And who are they, O Allah’s Messenger?” He responded, “That which I and my Companions are upon today.”-(Tirmidhī, no. 2641).
Allah (the almighty) said in the Quran:
“And hold fast to the Rope of Allah, all together and be not divided.”-(The Quran 3:103).
Secondly, the Quran is the same whether the copy you have or I have. All Quran copies in the world are the same. There is a no different version of the Quran in each region, people or etc. The Quran is one, and its version is also one.