The Qur'an and the Bible are the holy books of the two worldwide religions of Islam and Christianity, respectively. There are a lot of similarities between the religions in terms of its place of origin which is the present Middle East, some of the concepts and values that they espouse, the conception of monotheism and the like. It is natural for anybody to draw a comparison between the two books that offer the substantial philosophical basis to the religions.
It is only a thorough study that can reveal the differences between both the books. A layman’s view might give you an impression that both of them are similar. Of course they do, but there seems to be overwhelming and cardinal differences between the two.
The Qur'an consists of the utterances of the messenger of God, in the guise of Gabriel as revealed to the Prophet Mohammad. The book is a dictation in that sense. It is written in the first person pronoun as God speaking directly to the humankind through the Prophet. It was compiled after the death of Mohammad by the Caliphs who succeeded him.
Bible is a collection of smaller books written over a long time period in comparison to that of the Koran. The Bible consists of about sixty books. In the Bible, we have many prophets of God speaking on behalf of Him to the people. The book consists of commentaries authored by many men. You also have sometimes, the word of God directly revealed to the humankind. The Bible also gives narratives of the history of the Jewish people and of the early community of the Christians.
The one common and popular narrative in both the books is the story of the Creation by God. Though the story line is similar, there are actual differences which can be learned only with careful observation. From the very beginning onwards, there are differences. A careful, thorough and analytical study of both the books is more than enough to render the hypothesis that the Qur'an is copied from Bible as incorrect.
The Bible, especially the New Testament holds that Jesus is the Son of God, while Koran considers Jesus as only one of the many prophets who had been sent to the humankind by the God. Thus Koran directly negates the Godliness and divinity attached to Jesus.
Both the holy books profess ethics. Both the books give its followers a roadmap to heaven, the guidelines for a life that is pleasing to the Lord God. However, both the ethical narrative is slightly nuanced. The difference that creeps up here is in these nuanced professions of the ethics.