I believe the "perfection" there is the perfection of immaculate conception.
I was reading about that one time. When Mohammed steals the Christ story for his new religion it's spun a little different though, isn't it. In Mohammed's version doesn't light come out the angel's sleeve, or elbow, or something, because he's empowered by Allah to plant the seed.
I believe in the Koran though, Jesus is seen more though as just another prophet.
It's all fascinating of course but it's not the same thing as what they say about Mohammed.
(I can't give you a link for these, because I got a virus warning, but they're all over the place and easy to access with a Google.)
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In Islam, the Prophet Muhammad is known as al-Insān al-Kāmil (the perfect human) and uswa hasana (an excellent model of conduct)
Many Muslims and non-Muslims alike, often attempt to excuse away Muhammad's immoral behavior using moral relativism and/or a "tu quoque" defense against the actions of other religious figures from various faiths. They claim he was a “product of his time” and that he should not be judged by modern standards, but what they fail to mention is that this particular Islamic doctrine, the belief that Muhammad is the uswa hasana, leaves those defenses redundant.
Muhammad repeatedly told his followers to follow his Sunnah (example) and in the Qur'an we see that Allah even asserts his morality as being “sublime” (Qur'an 68:4), therefore Muhammad cannot be seen as simply a product of his time. To do so, would mean to also concede the fact that the Qur'an is outdated and not relevant to the modern world. From an Islamic perspective, this is unthinkable. The Qur'an is beyond the constraints of time. It is not simply 'inspired' but the very words of Allah, uttered through the lips of his final messenger. Hence, Muhammad's actions are (and always will be) morally acceptable to the Muslim.
$1:
The assertion by Qur’an confirms it even further: “Wammaa arsalnaaka illaa rahmatal lil- aalameen! (21:107).” [O Muhammad We sent you not, but as a mercy for all creature.”
All Muslims are required to accept and adhere to all of the teachings of Prophet Muhammad. Allah told Muslims in the Qur’an-(8:24): “O you who believe! Answer Allah (by obeying Him) and As His Messenger (obeying him) when he calls you to that which will give you life.”
And so on...and it does go on.
But for me if the bible tells you to be like Christ and you want to emulate Christ - fill your boots. It's not going to hurt me. But if you want to emulate Mohammed in all he did (Rape, theft, murder, pedophilla) you become the enemy of western civilization.