A: [Now] that’s a really good question! The prophecies of their coming, is a good start.
Jesus prophecies were foretold in the Old Testament before He was born. Some 700 years before His birth, the city of His birth was foretold, even though it wasn’t the home of His parents. (Micah 5:2, “But thou, Bethlehem Ephratah, [though] thou be little among the thousands of Judah, [yet] out of thee shall He come forth unto me [that is] to be ruler in Israel; whose goings forth [have been] from of old, from everlasting.”)
1,000 years before His birth, King David predicted His death, though the method wasn’t even known. (Psalm 22:14‐16, “I am poured out like water, and all My bones are out of joint: My heart is like wax; it is melted in the midst of my bowels. My strength is dried up like a potsherd; and My tongue cleaveth to My jaws; and thou hast brought Me into the dust of death. For dogs have compassed Me: the assembly of the wicked have inclosed Me: they pierced My hands and My feet.”)
500 years before His birth, He would be betrayed for 30 pieces of silver. (Zechariah 11:12‐13, “And I said unto them, If ye think good, give [me] my price; and if not, forbear. So they weighed for my price thirty [pieces] of silver. And the LORD said unto me, Cast it unto the potter: a goodly price that I was priced at of them. And I took the thirty [pieces] of silver, and cast them to the potter in the house of the LORD.”)
Concerning Muhammad’s coming ‐ no predictions in the Koran nor other books of Islam. He appeared without any prior notice or prophecy.
Sticking with the comparisons of their births: Jesus birth predicted in Bethlehem. He would be born of a virgin. (Isaiah 7: 14, “Therefore the Lord Himself shall give you a sign; Behold, a virgin shall conceive, and bear a Son, and shall call His name Immanuel.”)
He was named before His birth. (Matthew 1:21, “And she shall bring forth a Son, and thou shalt call His name JESUS: for He shall save His people from their sins.”)
Muhammad’s birth: History indicates he was born into a poor family, his
father died before he was born; his mother passed away before he was 6 years old. He was raised by his grandmother and uncle. There are no claims made
by Muslims concerning his birth.
Conclusion: Birth of Jesus was miraculous; He was born of a virgin. Muhammad had 2 parents, therefore his birth was ordinary.