What was different? The indwelling Spirit. Christ in you, the hope of glory.
Again: 'same.' Rather, because Paul emphasizes it, what was the difference? Acts does a good job of spelling out differences, especially
Acts 15:1-35 Acts 15: 4 When they came to Jerusalem, they were welcomed by the church and the apostles and the elders, and they declared all that God had done with them. 5 But some believers who belonged to the party of the Pharisees rose up and said, “It is necessary to circumcise them and to order them to keep the law of Moses.”
Acts 15: 8 And God, who knows the heart, bore witness to them, by giving them the Holy Spirit just as he did to us, 9 and he made no distinction between us and them, having cleansed their hearts by faith.
--Part of the mystery that had to be stated.
2nd Acts (regular?) Dispensationalism: Genesis 22:18 In your seed all the nations of the earth shall be blessed, because you have obeyed My voice.” Genesis 3:15 and so on. Note with me that 'obedience' (Law) is the avenue for blessing such that in Acts 15, there was much debate about whether gentiles were to be circumcised and obedient to the Law. It was still a mystery (Even Peter said Paul's writings (mystery/gospel) were hard to understand.
2 Peter 3:16 Why? If we keep asking good
why questions, we'll always be better off in scripture understanding. Every Bible study hermeneutic class I've had to date tells us to ask repeatedly 'who, what, when, where, why, how' of every text and implores us to 2 Timothy 2:15 " Do your
best to present yourself to God as one approved, a worker who has no need to be ashamed, rightly handling the word of truth."
I cannot think it worth effort in threads like this. We are doing deep bible study together. In every sense, Mid Acts asks questions none of the rest of us ask as often as they, yet is exactly what good Bible study methods tell us to do. I've inundated myself with Mid Acts teaching these last 5 years simply because the hard questions are asked and I've had to entertain them. Even so, I've come to realize I have to agree on a huge number of scriptures and truth thereof.
And, of course, opening the door to the gentiles, although that was prophesied.
Yet 'how' (good bible study questions) was the door opened? Through keeping the Law? Without Paul in Acts 15:8, you and I would have to become Messianic Jews. Again, part of the mystery is that Jesus does this all for us. In a few words,
the Mystery was the complete work of Christ Death, Burial, Resurrection, sending the Spirit, and interceding continuously on our behalf! If nothing more, you will appreciate Mid Acts in every sense that it reveals more and more of what Our Lord Jesus Christ actually did for us and the extent! Worth that look!