The Unis pyramid is a burial pyramid, not an initiatory pyramid. Text or hieroglyphics and not written inside of the initiatory pyramids. The other difference is an initiatory pyramid is made of blocks of stone, where the burial pyramids are made of rubble with an outside casing.. The Unis texts are unique in the sense that that are some of the oldest and best preserved carved text in a burial tomb. I have been inside this “pyramid” four times. When I found these resource links listed below, I felt I had to share it with everyone.

Pyramid of Unas | The Ancient Egypt Site (ancient-egypt.org)
http://www.ancient-egypt.org/history/old-kingdom/5th-dynasty/unas/pyramid-complex-of-unas/pyramid-of-unas.html

Pyramid of Unas – Madain Project (en)
https://madainproject.com/pyramid_of_unas

Funerary Complex of Unas – Madain Project (en)
https://madainproject.com/funerary_complex_of_unas

Unas Pyramid (matterport.com) Virtual Tour
https://my.matterport.com/show/?m=o5Ex5Xo7UkE

English Translation of the Unas Pyramid Texts – Pyramid Texts Online
https://pyramidtextsonline.com/translation.html

Also an excerpt from “Interpreting Ancient Egyptian Mythology”