The old edition of the People's Education Edition has always been famous for its strict logic and clear knowledge arrangement, which was revised by many old teachers and experts for many years.
However, due to the general difficulties in that year, the situation of curriculum reform and burden reduction was eliminated first. The current People's Education Edition is rewritten according to the new curriculum standard.
In terms of difficulty, as far as I can see from the textbook exercises, the People's Education Edition may be a little more difficult than the Beijing Normal University Edition. However, because there is no actual teaching, perhaps the views are somewhat biased.