The "Stela" was made around 1350 BCE, during the amarna period, and depicts Akhenaten, who initiated monotheism in Egypt, and his consort Nerfiti, in a limestone relief carving. The "Stela" represents the pharaoh and his family in a naturalistic manner that breaks from the traditional Egyptian stylization. The royal couple hold their three babies underneath the sun in a garden setting. The lines of the carving are more fluid, and the human forms are depicted as stylized, but more to a natural scale. Generally the piece indicates movement and intimacy rather than ordered ritual. The connection between the pharaoh and the sun, symbolizing the one god Ahten is made explicit by the rays of the sun shining down on the happy family.

The pieces are both identifiably Egyptian, but the latter piece has a more realistic feel to it.
References

"El-amarna (Akhetaten)." (2009). Egyptology Online. Retrieved from http://www.egyptologyonline.com/amarna.htm#amarna art.

"The Narmer Palette." www.ancient-egypt.org. Retrieved from http://www.ancient-egypt.org/index.html.

"Stela of Akhenaten and His Family." (2005) Eternal Egypt. Retrieved from http://www.eternalegypt.org/EternalEgyptWebsiteWeb/HomeServlet-ee_website_action_key=action.display.element&story_id=9&module_id=73&language_id=1&element_id=60669.