what is the different between Eugene family and Ifeoma family?

Eugene embraces strict rules and discipline. He expects his family to display high ideals and behavior at all times, and although Eugene appears to be a fine Catholic, he does not adhere to the Church's teachings in his own private life.

Aunty Ifeoma encourages her children to question authority, raising them with faith but also intellectual curiosity.

Eugene believes that the western religion is the only one and true way to heaven. So compels every member of his family to adhere strictly to catholicism without any relationship to tradition and culture, whereas Ifeoma's conception of the western religion indicates that it can coexist with tradition and culture; so she teaches to her children.