Swami Vivekananda describes the distinction between them in this way. Of Sanatan dharma, he says:
We know that in our books, a clear distinction is made between two sets of truths. The one set is that which abides for ever, being built upon the nature of man, the nature of the soul, the soul's relation to God, the nature of God, perfection and so on; there are also the principles of cosmology, of the infinitude of creation, or more correctly speaking, projection, the wonderful law of cyclical procession, and so on; these are eternal principles founded upon the universal laws of nature.
Of Yuga dharma, he says:
The other set comprises the minor laws, which guide the working of our everyday life. They belong more properly to the Puranas, to the Smrtis, and not to the Sruti. These have nothing to do with the other principles. Even in India, these minor laws have been changing all the time. Customs of one age, of one yuga, have not been the customs of another, and as yuga come after yuga, they will still have to change.
https://en.wikipedia.org/wiki/Yuga_dharma
We know that in our books, a clear distinction is made between two sets of truths. The one set is that which abides for ever, being built upon the nature of man, the nature of the soul, the soul's relation to God, the nature of God, perfection and so on; there are also the principles of cosmology, of the infinitude of creation, or more correctly speaking, projection, the wonderful law of cyclical procession, and so on; these are eternal principles founded upon the universal laws of nature.
Of Yuga dharma, he says:
The other set comprises the minor laws, which guide the working of our everyday life. They belong more properly to the Puranas, to the Smrtis, and not to the Sruti. These have nothing to do with the other principles. Even in India, these minor laws have been changing all the time. Customs of one age, of one yuga, have not been the customs of another, and as yuga come after yuga, they will still have to change.
https://en.wikipedia.org/wiki/Yuga_dharma
