No, It does not confirm Romans; it conforms to romans. the gospel is the power of God unto salvation to everyone who believes; to the Jew first and then also to the Greek/Gentile; that is why even the Apostle to the Gentiles always goes to the Jew first. Each if the Apostles apparently had primary missions or assignments from The Lord, as we see from scripture and traditions that were written into history later.
As noted in a prior post to you, the traditions are not all agreed upon by the early "church fathers." In that case we have to use the Bible...the only one of the two that has not changed and the only one of the two that is God-breathed.