Saktyavesa Avataras

Krsnasandarbha 3/8: We may note in this verse that both Krsna andBalarama are described as having markings of the Supreme Personalityof Godhead on the soles of Their feet. These auspicious markings are seen only on the feet of the Supreme Personality of Godhead Himself.They are never seen on the feet of saktyavesa incarnations(empowered loving entities) such as Prthu Maharaja and others.

Satvata Tantra:

Nara Rsi entered Arjuna, and therefore Arjuna is an avesa incarnation of Nara Rsi. Lord Krsna, however, is the originalSupreme Personality of Godhead Himself.

The Kumaras, Narada, Vyasa, Sukadeva, and others are sub partial(kala) incarnations. They display a part of the Lord's transcendental knowledge.

Gaya, Prthu, and Bharata are sub partial (kala) incarnations endowed with specific potencies (sakti). The incarnations of the modes of nature are headed by Brahma. The parts of these incarnations are the potency (vibhuti) incarnations.