Jim and Antonia are similar in several ways.
First, both are new to the prairie. Jim has been sent from Virginia to live with his grandparents. He has to learn the ways of the farm and adapting to the harsh weather conditions. Similarly Antonia has immigrated with her family to America. She, too, has to adapt to a new environment and learn the new customs and traditions.
Second, both Jim and Antonia are proud teenagers. Antonia is fiercely loyal to her brother and mother, especially after their father dies. She does not yield even when it becomes apparent that her friends and neighbors are scorning them. Jim is also proud. He recognizes characteristics in Antonia's mother and brother that she does not agree with - such as Mrs. Shimerda's demands that things be givent o her. He is not afraid to voice his opinion, despite his age.