Difference is only a matter of whether all points of one correspond to all those of the other. Whether you think they do or not, then there is your answer. Yes, "the Law and the Prophets" is a reference to the OT in general, but this says nothing about any specific laws. Matthew 7:12 addresses these: So in everything, do to others what you would have them do to you, for this sums up the Law and the Prophets.In other words, the intent of the law (and the OT in general) was still in force , but not the letter of the law. This is exactly as I said earlier. The rules can give way to maturity.