Where as a Christians entire belief system is based on faith in Gods word and not on their Christian works, a Muslim is based on works only. Whether or not you believe the Koran is inerrant word of Allah will not affect your eventually destiny. You might lose your position in the tribe, but you will still be a Muslim
I would quibble over your use of "Word of God" for the Koran as Allah is not God in Judeo/Christian sense.
Allah and the Yahweh is very different in their attributes.
You are ill informed.
Christianity is based absolutely and categorically on the belief in the Resurrection.
If you do not believe in the actual, physical, bodily resurrection of Jesus, you cannot be a true Christrian.
You might be a species of Christian, but not a true Christian.