The syllabus for UPSC Mains differs significantly from the Preliminary exams in its depth and focus. The Mains consists of nine papers, including essay writing, general studies, and optional subjects, requiring a comprehensive understanding of topics. In contrast, the Preliminary exams primarily assess candidates' knowledge through objective questions, focusing on general awareness and fundamental concepts. While both phases aim to evaluate candidates' capabilities, the Mains requires subjective responses, critical analysis, and the ability to articulate arguments effectively. Thus, preparation strategies must be carefully tailored to tackle the unique challenges presented by each phase.