No such division exists in Christianity.
Gal 3:27 For as many of you as were baptized into Christ have put on Christ.
Gal 3:28 There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus.
Gal 3:29 And if you are Christ's, then you are Abraham's seed, and heirs according to the promise.
The notion that there were different standards for Christians is absurd. The apparent division came about because those who were coming out of Judaism had to shed themselves of NON-SCRIPTURAL Jewish customs and traditions. Those coming from gentile systems of worship HAD to learn what the truth was from God inspired scripture. And one of those truths is that the sabbath belongs to the Lord.
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"It is my judgment, therefore, that we should not make it difficult for the Gentiles who are turning to God.