Islam and Christianity are the two largest and most missionary-minded religions in the world. Their beliefs are very similar in many areas. They are both monotheistic, were founded by a specific individual in a definite, historically verifiable setting, are universal, and believe in the existence of angels, heaven and hell, a future resurrection, and that God has made Himself known to man via a revelation.
However, there also are many obvious differences between them, particularly in relation to the person of Jesus Christ, the way of salvation, and each faith's scripture or scriptures. These differences encompass the very foundational tenets of each religion, and therefore, while Islam and Christianity can both be false, they both cannot be true.
Our task is to examine each religion's apologetic, or defense of their faith, to see if the claims of either religion are verifiable. Particular attention will be paid to the founder and the scripture or scriptures of each faith. The reason for this should be self-evident: it is very easy for someone to make claims regarding himself, proving them is an entirely different matter.