Harmonizing on Different String Pairs

The exact same sequence of diatonic thirds that you learnt previously will work for every major scale because every scale is built upon the same order of whole steps and half steps (WWHWWWH). The distance of the thirds will therefore always be the same.

A Major in Thirds.png

Taking the scale onto string 3(G) and playing a third above on string 2(B) will give us the same intervals but the shapes on the fretboard will be different because of the tuning difference between these two strings.

The major third has the two notes in the same fret:

A Major 3rd.png

Whereas the minor third has the diagonal shape, with the minor third being one fret lower on string 2(B):

A Minor 3rd.png
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