[Ali Imran]

Good knowledge...some countries read the hafs some read the warsh..While both are widely accepted as valid readings, they differ in aspects like word forms, tenses, and letter choices, particularly in certain verses. 

These differences, though subtle, can alter the nuance and meaning of the verses. 

So which version is the word of God?

Both are the word of God. Both came through the same messenger, Muhammad صلي الله عليه وسلم.

I've shown you an example of the difference. One says God is the King of judgement day and the other says Owner of judgement day. Do they contradict? No they don't.

What you cannot find are contradictions, like Hafs saying we must fast in Ramadan and Warsh saying fasting in Ramadan is foolish. As you already know, you can find such contradictions in the Bible.