The verification that there is no significant difference between the gifts of God stated in Moroni 10:8-17 comes in verse 9, where it is declared that the gifts are given by the Spirit.
These may, or may not, have been intended to work in sets of two, but it seems profitable to examine them as if that was the intention.
In this case, the first two gifts deal with teaching. The first is to teach the “word of wisdom,” and the second to “teach the word of knowledge.” The repletion of “word of” verifies that we should not be sidetracked by the similarity in words to the Word of Wisdom. That is entirely different, and not intended here.
In this case, the two phrases are parallel expressions that there is a gift to teach. The gift, however, is not to teach mathematics or economics, but the things of God; hence, wisdom. In that parallel context, the knowledge is similarly knowledge of Godly things.