Enough to have persuaded many that what they believe is sufficiently different and important to have justified dividing the Body of Christ by the formation of a denomination based upon their beliefs.
Would they have done that for matters other than major tenets of faith?
Baptism, OSAS or OSnotAS, the 4th commandment, the return of Christ, an understanding of the trinity, the degree of inerrancy of the Bible, the first and second resurrection, eternal torment in the Lake of Fire, annihilationism, universal reconciliation, etc.,etc.(all based on biblical interpretations).