How is a brioche bun characterized?

A brioche bun is characterized by its soft, slightly puffy texture along with a rich flavor profile, which comes from a high content of eggs and butter. This combination of ingredients contributes to the bun's tender crumb and luxurious mouthfeel, making it a remarkable choice for burgers and sandwiches. The presence of eggs not only enhances the color but also adds richness, while the butter provides a smooth, creamy flavor that sets it apart from other types of bread, which can be drier or denser. In contrast, options describing heavy, dense, thin, dry, crunchy, or crispy textures do not accurately reflect the light and airy qualities that define a true brioche bun.