Actually Genesis 1.2 and Ecclesiastes 12.7 show that the Spirit of God and the spirit of man are of different kinds. The Spirit of God does not depend upon the spirit of man; indeed, He preexisted it from eternity. The spirit of man, however, was created by God, and there will be a reckoning with the Creator after death.
Those are trivial diferences. I can point more differences between men and women. I can point deeper differences between the Father, the Christ and the Holy Spirit.
As farouk stated, those differences are hardly trivial. In fact, they are among the most significant differences there are. There are far more similarities between men and women than there are between humans and God. God is the Creator and man is a creature.
Php 2:5 Have this mind among yourselves, which is yours in Christ Jesus,
Php 2:6 who,
though he was in the form of God, did not count equality with God a thing to be grasped,
Php 2:7 but
made himself nothing, taking the form of a servant, being born in the likeness of men.
Php 2:8 And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross. (ESV)
Php 2:5 Your attitude should be the same as that of Christ Jesus:
Php 2:6 Who, being
in very nature God, did not consider equality with God something to be grasped,
Php 2:7
but made himself nothing, taking the very nature of a servant, being made in human likeness.
Php 2:8 And being found in appearance as a man, he humbled himself and became obedient to death— even death on a cross! (NIV)
Jesus was God in nature and, without losing that nature, took on the nature of man. That is what is being spoken of in John 1:1-14, the Incarnation, and is a basic tenet of the Christian faith.