The Bible on the otherhand, was the inspired word of God giveninto the Prophets, all who could pass the prophetic test, something Mohammad could never do. he was an evil murdering pedophile, not a prophet.
The Koran is full of fables and myths that were around long before Mohammad came along. Being illiterate and not very smart, mohammad didn't know what were jewish fables and local sabian folklore and what was written in the bible and gospel,
so he mistakenly "recited' them into the koran.
The Koran is inspired by Mohammad, or if you insist, a rock named allah, which is the name of "the rock most high" that the pagan arabs called "allah".
It also contains ancient stories that were around long before the Sumerians invented writing or Abram of Ur became enlightened.
The claim made by Islam regarding the Koran is that it exists in Heaven, and a "copy" was recited to Mohammad who, in turn, recited it to humanity. At the same time it contains histories, culture and Mohammad's most notable (and non prophetic) sermons.
These books are what they are.
BTW, don't get too hung up on the "rock" thing ~ one division of Christianity has some thoughts on the matter regarding the "rock" which Jesus made the foundation of His church, and they are a tad sensitive on the matter.
That the Arabs use the same "root word" for rock, and God, and Moon is irrelevant. Give you an example, look at the word "table". Now, use it as "table", "tablecloth", and "tablesaw". Each of these three items is vastly different. The Arabic language, like others, uses words in various forms to mean different things.