To summarize what y not said (or the summary of the sutta) is to indicate the nine type of persons who are free of the apayas, but have not attained the Arahant stage yet:
There are five types of Anagamis, Sakadagami, and three types of Sotapanna.
So, the question is what are the differences among the five types of Anagamis and the three types of Sotapannas.
Those are just differences in understanding of the true nature of this world (anicca, dukkha, anatta, asubha, rogata,etc, where the most important first three are called Tilakkhana). I don’t think it is worthwhile to analyze in detail (even if possible) what those differences are.
Even if one does not know any of these details (even what Tilakkhana are in words), one may be able to make progress and attain magga phala by comprehending the unfruitful AND dangerous nature of this world. That is the critical point: understanding the true nature of this world.
At the time of the Buddha, there was no written material for people to read. Many of them did not even know these terms. They just went to listen to the Buddha and WHILE LISTENING understood these characteristics of nature, and attained magga phala at various levels.
This is a key point that is being discussed at this topic too: “Discourse 1 – Nicca, Sukha, Atta“.
P.S. Of course, it is always good to have more details. If someone can explain those nine stages in more detail, that would be appreciated.