How are nwoye and okonkwo revealed to be more similar than different?

Nwoye is Okonkwo's first son, and serves as a contrast to the manliness of the Igbo his father exemplifies.

Nwoye's like for the feminine, in particular the stories his mother tells, causes him to not relate well with his father. Further, Okonkwo expects him to be as strong as he was, and to have taken a woman by now, but he is not as strong, and has not yet taken a woman. Okonkwo fears that Nwoye will be like his grandfather Unoka, who was a lazy drunkard debtor and tied without title or property.