Actually yes, I see what you mean with the similarities. Applejack compared to Twilight also possesses a lot of know-how and is smart, but it's a more worldly sort, born of a more personal, applied experience than Twilight's abstract, 'scientific' way of learning. Both are educated, just in vastly different systems (which both work), so I would argue that there are similarities to be found even there, it's just differs in how the core values are expressed.
I think (at least from what I have seen so far) that Twilight inhabits a curious space between Applejack and Fluttershy; smart with relatively strong leadership qualities like Applejack, but a bit more insecure and concerned about how other ponies judge her, especially Princess Celestia.