The Q manuscript furnishes for Matthew and Luke a considerable body (over 200 verses) of Jesus’ sayings.
Matthew and Luke tell identical stories about:
The temptation.
The centurion’s son.
Sermon on the Mount.
Lord’s prayer.
The use of identical words in Matthew and Luke indicate the existence of Q.
Luke differs more from Mark than Matthew. Luke either had other writings or else he made his own record of oral traditions.
Matthew contains a striking series of Old Testament quotations not found in Mark or Luke.
There are several stories peculiar to Matthew:
Coin in fish’s mouth.
Dream of Pilate’s wife.
Guard at the tomb.
It is generally believed (including the Urantia Book) that Mark is the gospel according to Peter. But the language is not that of Peter.
In Paul’s preaching he appeals to:
The Scriptures.
His personal experience.
Tradition—common knowledge.
Paul’s traditions differ in some respects from the narratives of the Synoptic gospels.
Form criticism is more recent in origin. It concerns the “form” ‘of the narrative as indicating date of origin. But the various scholars are not very well agreed on the basis of interpretation.