Nicholas plays to what is portrayed here as simple-minded superstition by sharing the secrets of his "astrologye" (A 3514), the source of his information about the flood that will supposedly destroy everyone by John, Alison his wife, and Nicholas. Hence one way to compare these texts in terms of learning and the power of knowledge is to see how the texts pit communities and professions against each other.
The Miller and the Reeve tell stories about students who try to take advantage of the working population. The sources of the students' authority in each case is different. Nicholas uses books to make a fool of John; on the other hand, John and Aleyn in the Reeve's Tale try to outwit Symkin, the miller, through observation and common sense.
Typically such a contrast or comparison as this is portrayed as a contest between two social groups of men. If you look further, however, you will have to ask if how the women in each text occupy positions relative to those of the men.
Begin this link by asking who the women are and what sorts of knowledge they command. They compare the women to the men. There are the makings of several different kinds of papers in this link, which requires more research into the text than reading from secondary sources.
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