Pure Yang true qi is an invisible and formless energy, and its reaction is characterized by its untimely and indefinite location. This true qi is flowing, but invisible to the naked eye, it has the effect of life, is to promote the physiological activities of the viscera power.
The supreme yang true qi, on the other hand, is more inclined to a supreme power or energy, which is the extreme of yang qi and has the amazing destructive power of destroying everything.
Overall, Pure Yang True Qi emphasizes more on the purity and activity of True Qi, while Supreme Yang True Qi emphasizes more on the extreme and destructive nature of True Qi. There are some differences between the two in terms of nature and manifestation.