Here's a comparison of their significance:
Benvolio: Benvolio is a level-headed and responsible cousin to Romeo. He often tries to mediate conflicts and promote peace between the Montagues and Capulets. Benvolio's importance lies in his role as a voice of reason in a feud-driven society. He urges Romeo to forget about Rosaline and guides him toward Juliet at the Capulet ball. Benvolio is also the one who informs Romeo about Juliet's apparent "death" by drinking the sleeping potion, leading to Romeo's impulsive decision to take his own life.
Mercutio: Mercutio is a fiery and quick-witted friend of Romeo. He brings humor and wit to the play with his banter and wordplay. While Mercutio may seem like a secondary character, his significance lies in his influence on Romeo's actions. Mercutio's macho attitude and eagerness to engage in a sword fight with Tybalt ultimately results in his tragic death. This event becomes a turning point in the play, pushing Romeo toward impulsive violence and setting the stage for the tragic ending.
Ultimately, both Benvolio and Mercutio play essential roles in "Romeo and Juliet." Benvolio's rational and cautious presence serves as a contrast to the passionate and reckless nature of Romeo, Mercutio, and Juliet. On the other hand,