Hi Tawl Pawl,
That is not true. Since you mentioned Christianity, i shall share with you what i came to know as the truth. There is no eastern or western Christianity. East and west has always joint hands in spreading the truth by having regular conferences with leaders from all nations around the world. Encouraging one another as one body of Christ by visitation and sharing of sermons, missions and ministering to a needy world. One belief, one vision.
When you speak about logic and heart, you are referring to the logic and emotional side of the mind(brain). The heart is an organ. But the phrase 'a wicked heart' is actually the core of a person's intent/motive; which is also part of the brain. A person can only 'know' God by the conviction of the Spirit of truth (Holy Spirit). Even then, a person may 'know about' God by another person. There are not of the same thing. Knowing God and know about Him are not the same. That perhaps, is the differences of mind and heart you are referring to.
There would not be any agreeable sides between east or west because in truth if they so term themselves as Christian, then there was never a 'differing' issue. Because friends, there is only one body of Christ; the church is of one spirit. If in fact you are referring to a different set of religion and beliefs altogether, then it may be the issue of differences.
Thank you for giving me a chance to share this.