What did Jim and Antonia have in common in Willa Cather's novel, My Antonia?

In Willa Cather's novel, My Antonia,
Jim and Antonia share several similarities.

Both come as
young children to the formidable plains of Nebraska. Jim travels west to live with his
grandparents, while Antonia accompanies her Bohemian family from overseas to start a new
life.

Both youngsters have a great deal to learn about this
new land in terms of climate, plants, animals, and survival, especially in the form of
farming.

Jim and Antonia are passionate about the frontier
(especially in the warmer months, such as the spring) and the mysteries the land waits
to share with them. Each seems to have a desire to learn that many others do not
have.

Jim is considered to be a member of the polite class,
while Antonia is considered nothing more than a foreigner, or hired help. However, this
does not stand between them, and they find that spending time together and celebrating
their existence, as they do when they dance, keeps them close over the
years.