Intro:
This is the classification to the different kinds of Reiryoku and Reiatsu that different kinds of beings possess. For example, Deities possess Godly/Divine Reiryoku, Mortals, such as High-Spec Humans, Quincies, Fullbringers, and Discipuli, possess normal Mortal Reiryoku, Pluses, Souls, Shinigami, Hollows, and Arrancars all possess Spiritual Reiryoku, and Demigods possess an infusion of Mortal Reiryoku and Divine Reiryoku, being an offspring of a Deity and a Human.
Reiryoku Classification/Tier:
Mortal Reiryoku: Mortal Reiryoku is the type of Reiryoku that Humans with Spiritual Energy, whether high or low possess. High-Spec Humans, Quincies, Fullbringers, and Discipuli, being Mortals/Humans, possess this type of Reiatsu. Normal Humans obtain this Reiatsu when they are exposed to a high amount of Reiatsu within the area.
Spiritual Reiryoku: Spiritual Reiryoku is the type of Reiryoku that supernatural beings such as Pluses, Souls, Sprits, Shinigami, Hollows, and Arrancars possess. Beings with this type of Spiritual Energy have bodies that are completely made up of and composed of Reishi instead of atoms. And as a result, they are completely invisible to Humans/Mortals who completely lack Reiryoku. Only Gods, Demigods, and High-Spec/Spiritually Aware Humans can sense and see Spiritual beings, due to Gods being Divine, Supernatural, Celestial beings. Demigods possessing a fusion of Mortal Reiryoku and Godly Reiryoku. And Spiritually-Aware Humans possessing Reiryoku, Mortal Reiryoku, but Reiryoku nonetheless.
Demigod Reiryoku: Demigod Reiryoku is the type of Reiatsu that is a perfect fusion between Mortal Reiryoku/Spiritual Reiryoku and Divine Reiryoku. Because Demigods possesses Godly Reiryoku due to also being born from a God, they can sense Gods and other Demigods rather easily. And they can also see and sense Hollows, Arrancars, Shinigami, and other Spiritual Beings due to not only possessing Godly Reiryoku, but also possessing either Mortal Reiryoku or Spiritual Reiryoku.
Godly/Divine Reiryoku: Godly Reiryoku is the type of Reiryoku that only Deities possess. This kind of Reiryoku is far more advanced and effective than Mortal and Spiritual Reiryoku. It is a different form of Reiryoku that only Gods possesses and wield. Godly Reiryoku cannot be sensed by those who lack Godly Reiryoku, such as Mortals, Soul Reapers, Hollows, and Arrancars, all of whom lack Divine Reiryoku, regardless of how powerful and greatly enhanced to the max their sensing techniques (such as Pesquisa) are. Godly attacks also cannot be sensed by Mortals, Shinigami, Arrancars, and Hollows due to the fact that they are made and empowered from Divine Reiryoku. The only ones who can sense Divine Reiryoku are obviously other Gods and Demigods, the latter who also possesses Godly Reiryoku being the offspring of Deities and Humans/Soul Reapers/Arrancars.
Godly Reiryoku has many names, Godly Reiryoku, Divine Reiryoku, Holy Reiryoku, and Celestial Reiryoku, but it is mainly called either Godly Reiryoku or Divine Reiryoku.
In order to possesses and use Holy Reiryoku, one has to either be a God or a Demigod. Sensing techniques from such as the Arrancar's Pesquisa, cannot sense Divine Reiryoku, no matter on how powerful or enhanced they are. Divine Reiryoku is also on a whole another plane than Mortal and Spiritual Reiryoku. And to go with this, Gods also possess innate powers and abilities that come from their Divine status and tap into nature itself. Plus their strength comes from the soul and the spirit. Long story short, Godly Reiryoku transcends Mortal and Spiritual Reiryoku.
Godly Reiryoku cannot be replicated and truncated by Mortals or Spiritual beings, as it is the type of Reiryoku which is completely unique and ONLY exclusive to Deities and Demigods. Plus the powers and abilities of Gods CANNOT be copied or truncated by Humans and Spiritual beings, nor can any Godly techniques and attacks for that matter. And any attempts to copy them will become utterly useless and will not work for that matter.