How are Scout and Dill similar in terms of their emotional maturity??

I would say that Scout is much more emotionally mature than her "fiance," Dill. Both of them have suffered parental losses: Scout never knew her mother, who died of a heart attack shortly after she was born. Dill's mother apparently skips from man to man, creating unstable father figures for her son and a self-awareness that he is unwanted. Scout has adapted well to her single parent life, and Calpurnia and Miss Maudie (and later even Aunt Alexandra to some degree) help to fill the female void. Dill actually seems to handle his situation quite well. He is most happy (he would have Scout and Jem believe) when he is spending time in Maycomb, although you can tell from his tales that he thrives on the little time that he has with his mother and father(s). Both Scout and Dill are intelligent and through the course of the book, they become even more aware of the worlds around them. They come to realize that their family situations are not normal, but they deal with them better than most kids their age.