Peter was an apostle to the Jews and Paul was an apostle to the Gentiles.
for the practical reason that the eleven were remaining in Jerusalem and Paul was a Roman citizen who had a passion for preaching to gentiles
The message is absolutely the same because believers aren’t Jew or gentile.
sits erroneous to think Paul didn’t preach to Jews or Peter didn’t preach to gentiles Peter converted gentiles and Paul converted Jews also
a Paul was already hated so bad by the Jews that he wasn’t safe in Jerusalem after he escaped with his life he stayed away mostly and had been born a Roman citizen which gave him many freedoms to preach among gentiles that non citizens didn’t have
Good example is his appeal to ceasar non citizens couldn’t do that so it was very practical that Paul lead the gentile ministry the message is no different in any way is the point
a Peter and Paul were Writing to the same churches that contained former Jews and gentiles here’s proof
“And account that the longsuffering of our Lord is salvation;
even as our beloved brother Paul also according to the wisdom given unto him hath written unto you;
as also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.”
2 Peter 3:15-16
Peter is addressing the Roman’s epistle written to the church at rome who Paul had never met yet heres peters second epistle saying to the same group that Paul also is Writing epistles to them
here is Peter converting gentiles
“And we are witnesses of all things which he did both in the land of the Jews, and in Jerusalem; whom they slew and hanged on a tree: him God raised up the third day, and shewed him openly; And he commanded us to preach unto the people, and to testify that it is he which was ordained of God to be the Judge of quick and dead. To him give all the prophets witness, that through his name whosoever believeth in him shall receive remission of sins. While Peter yet spake these words, the Holy Ghost fell on all them which heard the word. And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost. For they heard them speak with tongues, and magnify God. Then answered Peter, Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we? And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days.”
Acts 10:39-40, 42-48 KJV
And paul preaching the gospel to Jews
“And when they had appointed him a day, there came many to him into his lodging; to whom
he expounded and testified the kingdom of God, persuading them concerning Jesus, both out of the law of Moses, and out of the prophets, from morning till evening.
And
some believed the things which were spoken, and some believed not. And when they agreed not among themselves, they departed, after that
Paul had spoken one word, Well spake
the Holy Ghost by Esaias the prophet unto our fathers, saying, Go unto this people, and say, Hearing ye shall hear, and shall not understand; And seeing ye shall see, and not perceive: For the heart of this people is waxed gross, And their ears are dull of hearing, And their eyes have they closed; Lest they should see with their eyes, And hear with their ears, And understand with their heart, And should be converted, And I should heal them.( same thing Jesus said to them )
Be it known therefore unto you, that
the salvation of God is sent unto the Gentiles, and that they will hear it.
And when he had said these words,
the Jews departed, and had great reasoning among themselves.
(this is who paul and all the apostles preached to )
And
Paul dwelt two whole years in his own hired house, and
received all that came in unto him, preaching the kingdom of God, and teaching those things which concern the Lord Jesus Christ, with all confidence, no man forbidding him.”
Acts 28:23-31 KJV
Anyone willing to believe the gospel should hear any apostles words and believe Jew and gentile is a thing of the past and an irrelevant matter in Christ
practically it made sense for Paul to stay away from Jerusalem and go out it inter areas around where most gentiles were it doesn’t mean Paul invented his own message for gentiles or Jews it’s the same message and gospel that will save any one willing to hear and believe