Introduction:
In Political Science and International Relations (PSIR), the choice between providing an in-depth analysis of a single case study or presenting a comparative overview of multiple cases depends on the specific requirements of the question and the depth of understanding needed to answer it. Both approaches have their merits and can be used effectively in different scenarios.

In-Depth Analysis of a Single Case Study:
1. Focus: Providing an in-depth analysis of a single case study allows for a comprehensive examination of a specific event, phenomenon, or policy in great detail.
2. Detailed Understanding: This approach enables a deep understanding of the intricacies and complexities associated with the particular case under analysis.
3. Contextual Analysis: It allows for a thorough examination of the historical, social, political, and cultural context of the case, helping to identify the factors that contributed to its outcomes.
4. Rich Analysis: An in-depth analysis facilitates a more nuanced analysis of the causes, consequences, and implications of the case, providing a more comprehensive understanding of the subject matter.
5. Effective Illustration: It can be particularly useful when the aim is to illustrate a specific concept, theory, or framework by using a real-life example.

Comparative Overview of Multiple Cases:
1. Comparison: Presenting a comparative overview of multiple cases allows for a systematic comparison and contrast of different events, phenomena, or policies.
2. Identifying Patterns: This approach helps in identifying commonalities, differences, trends, and patterns across different cases, enabling the identification of broader themes or theories.
3. Generalization: It allows for the formulation of generalizations or theories that can be applied to various contexts, based on the similarities observed across multiple cases.
4. Broad Perspective: A comparative overview provides a broader perspective by considering multiple examples, which can enhance the analysis by incorporating a wider range of viewpoints and experiences.
5. Policy Implications: It can be particularly useful when the aim is to derive policy implications or recommendations by examining the outcomes and approaches adopted in different cases.

Conclusion:
In conclusion, the choice between providing an in-depth analysis of a single case study or presenting a comparative overview of multiple cases in PSIR answers depends on the specific requirements of the question. Both approaches have their merits and can be used effectively to demonstrate a comprehensive understanding of the subject matter. It is essential to carefully analyze the question, consider the depth of analysis needed, and select the approach that best suits the objectives of the answer.