There are MANY gospels Lon. Just read "the GOSPEL OF" and see.Mid Acts, btw, do not think that there is a different gospel today. They believe, like I and most of Christianity, that there is only one gospel. Knowing that has helped bridge the gap.
I'm wondering how you can think that the gospel of the circumcision is identical to the gospel of the uncircumcision.
Paul says that one was committed to him and the other to Peter.