[1][2] Unlike most Puranas that are encyclopedic, the Brihannaradiya text is focussed almost entirely on Vishnu worship, while the Naradiya text is a compilation of 41 chapters (20%) on Vishnu-worship and rest of the chapters (80%) cover a wide range of topics including a large compilation of Mahatmya (travel guides)[3] to temples and places along the river Ganges and neighbouring regions.
[8][9] Later discovered manuscripts and scholarship established that the Narada or Naradiya is the major purana, Brihannaradiya is the Upapurana.
[2][12] Wilson states that both texts are of likely recent composition, probably 16th or 17th century, because the five manuscripts he reviewed had verses mentioning certain events after Islamic invasion and control of the Indian subcontinent.
[9] Rajendra Hazra, in contrast, states that the core verses of the texts were likely first composed over various centuries, as follows: he dates the Vishnu-bhakti focussed text Brihannaradiya Purana to the 9th-century; he places the first 41 chapters of Purvabhaga and the first 37 chapters of Uttarabhaga to have been composed before the 11th century; and, the rest he states is of likely a comparatively later origin.
[5] The text also includes chapters on ethics and duties of members of various varnas and ashramas, vratas, and summaries on the samskaras.
[5] The encyclopedic sections discuss subjects such as the six Vedangas, moksha, dharma, adhyatma-jnana (monastic life), Pashupata philosophy, a secular guide with methods of worship of Ganesha, Narasimha, Hayagriva, Rama, Krishna, Hanuman, Shiva, and Lakshmi.
[25][26] Other topics covered in the verses of Uttarabhaga include flora and fauna, food, music, dance, dress, jewellery, weapons, and theories on war.
[5][1] After Rukmangadacarita, the text predominantly is a compilation of geographic Mahatmyas or travel guides for pilgrimage along river Ganges starting with Haridwar,[4] through Banaras (Kashi) towards Bengal, and nearby regions such as Gaya in Bihar and Nepal.