Henrik Ibsen's plays "Peer Gynt" and "Brand" are both significant works in his oeuvre, but they differ in several key aspects, including themes, style, and character development.

1. Themes:

   • Peer Gynt: This play is a dramatic poem that explores themes of identity, self-discovery, and the nature of reality versus illusion. It follows the journey of Peer Gynt, a young man who is more interested in fantasy and self-indulgence than in facing the harsh realities of life. The play is often seen as a critique of the Romantic ideal of the self-centered individual.
   • Brand: In contrast, "Brand" is a more serious and somber play that deals with themes of idealism, sacrifice, and the conflict between personal ambition and moral duty. The protagonist, Brand, is a priest who demands absolute commitment to his ideals, often at great personal cost. The play examines the consequences of extreme idealism and the struggle between human frailty and spiritual aspiration.

2. Style:

   • Peer Gynt: Written in verse, "Peer Gynt" is known for its lyrical and fantastical style. It incorporates elements of Norwegian folklore and myth, creating a surreal and often whimsical narrative. The play's structure is episodic, with a series of adventures that take Peer from Norway to North Africa and back.
   • Brand: Also written in verse, "Brand" is more straightforward and realistic in its style compared to "Peer Gynt." It is structured more traditionally, focusing on the internal and external conflicts faced by Brand as he navigates his rigid moral path.

3. Character Development:

   • Peer Gynt: Peer is a complex character who embodies the flaws of escapism and self-deception. Throughout the play, he undergoes a journey of self-realization, ultimately confronting the emptiness of his life choices.
   • Brand: Brand is portrayed as a tragic hero whose unwavering commitment to his ideals leads to personal and communal tragedy. His character is defined by his struggle to reconcile his rigid principles with the realities of human imperfection.

4. Philosophical Underpinnings:

   • Peer Gynt: The play is often interpreted as a philosophical exploration of existential themes, questioning the nature of the self and the meaning of life.
   • Brand: It delves into ethical and theological questions, particularly the nature of faith and the cost of absolute moral integrity.

In summary, while both plays are written in verse and explore deep philosophical questions, "Peer Gynt" is more fantastical and focuses on the individual's journey of self-discovery, whereas "Brand" is more realistic and examines the consequences of extreme idealism and moral absolutism.