Thank you for your question!
The names Satopradhan, sato, rajo, tamo; basically illustrate “entropy,” that is continuous degradation in quality of matter. To better understand this, picture a brand new car. Now, try to picture the same car in its more degraded usable stage, that is “old.”
You can picture the 2 ends of the spectrum, that is the “black or white,” the 2 extremes deal; however, it will be harder to pinpoint in time a car in its “rajo” or “sato” stages or exactly when one stage finishes to give away another stage. It is a continuous.
Now, when we become “tamopradhan” in a numberwise way; there is a period of “ascension” or going “up” the ladder, just as day changes into night, little by little. That is the period of being elevated one day and degraded the other, the period of “fighting” with old sanskaras, etc… until we give up the fighting… so it is gradual ascension.
Karmateet is being a detached observer. In that respect it has qualities of a “Satopradhan” stage; however, in a karmateet stage there is still awareness of duality, which is not known of in a Golden age Satopradhan stage, thus; there is a difference.