Lady Catherine is really Austen's satire of an old grande dame. She is a domineering woman who gets her own way because of her station and money in life. Mrs. Bennet has some of these same traits without having L. Catherine's money and station in life. Mrs. Bennet tends to be overbearing. Unlike L. Catherine, Mrs. Bennet is also crude and sometimes vulgar. Mrs. Bennet knows her fortunes lie in her daughters marrying well. She pretty well forces situations in her loud and obnoxious way. In this sense, their aggressive personalities are similar.