What is the fine-grained topic of the following text: The aim of this thesis is to compare the requiems of Brahms and Verdi, two composers completely different in significant aspects, the one being by nature introspective, serious, and even inclined towards melancholy in his creative work, whether done in a religious context or not; and the other being first and foremost a composer of operas, thus specializing in music for the stage or theatre, presupposing extroversion and even a degree of flamboyancy. Only return the topic.
Comparison of Brahms and Verdi's Requiems