The biggest common denominator is that 13.56M is used, and 13.56M is the most frequently contacted RFID band. This is why many people can't understand the difference between RFID and NFC.
In fact, the range of RFID is much wider than NFC, and there are many other frequency bands besides 13.56M. NFC has only one band of 13.56. The original intention of NFC was to exchange small data for near-field payment and loose authentication. NFC chose 13.56M as the basis and added a peer-to-peer communication. Traditional RFID can only a READER interacts with a TAG at a time, while NFC can transfer data between two READERs.
At the same time, NFC is not compatible with all 13.56M RFID, but it is compatible with the 14443 TYPEA and 15693 protocols. It is not supported by the 14443 TYPE B like our ID card.