1. Physical Appearance: Mr. Wickham is described as "tall and handsome, with a pleasing countenance," while Mr. Denny is not given a specific physical description. This establishes a contrast in their outward appearances, with Wickham seemingly more attractive and charming.
2. Reputation: Mr. Wickham is known for his scandalous and deceitful nature. He is described as a "disagreeable fellow" and is seen flirting with several young ladies simultaneously. On the other hand, Mr. Denny appears to have a more positive reputation and is regarded as a "very gentlemanlike man."
3. Social Etiquette: Mr. Wickham often disregards social norms and conventions. He gossips about others, openly expresses his disapproval of certain people, and engages in questionable behaviors. In contrast, Mr. Denny appears to be more respectful and well-mannered in his interactions with others.
4. Relationship with Elizabeth Bennet: Mr. Wickham attempts to deceive and manipulate Elizabeth Bennet by sharing a false account of his past and portraying himself as a victim of Mr. Darcy. Mr. Denny, on the other hand, does not engage in any such devious actions and maintains a more straightforward relationship with Elizabeth.
5. Motivation and Intentions: Mr. Wickham's primary motivation seems to be self-interest and financial gain. He seeks to marry a wealthy woman and uses his charm to gain favor. Mr. Denny appears to have more genuine feelings and intentions, as evidenced by his interest in Lydia Bennet and his desire to marry her despite the disapproval of his family.
6. Loyalty and Honor: Mr. Wickham's lack of loyalty and honor is evident in his treatment of others, particularly his former regiment and Lydia. He irresponsibly elopes with Lydia and refuses to take responsibility for his actions, putting the Bennet family's reputation at risk. Mr. Denny, on the other hand, attempts to repair the damage caused by Wickham and Lydia's elopement by agreeing to marry Lydia and supporting her socially and financially.
Through these details, Jane Austen effectively establishes the differences between the Wickham brothers, portraying Mr. Wickham as a deceitful and selfish individual, while presenting Mr. Denny as a more respectable and honorable character. These contrasting characteristics shape their roles in the storyline and influence their relationships with other characters, particularly Elizabeth Bennet and Lydia Bennet.