Biblical Christianity

2000 years have passed since the beginning of the New Testament dispensation of grace. The doctrine establishing the Church of Jesus Christ is well recorded. The Bible is the best selling book ever. Many homes have more than 3 copies. Many have several more than 3 copies. Almost all denominations that I am aware of claim that they are following "Biblical Christianity."
Obviously, there are differences. Are these differences of consequence, or merely stylistically diverse? Does the Bible have anything to say about this topic? More to come.