I can provide some general guidance.
Both H. K. Dass and Satya Prakash are well-known authors in the field of mathematical physics, and they have written several books that are widely used by students and researchers. The "better" book between the two would depend on your specific needs, preferences, and the level of mathematical physics you are aiming to study.
To determine which book is more suitable for you, consider the following factors:
Content and Scope: Review the table of contents and the topics covered in each book. Assess whether they align with your learning goals and cover the areas of mathematical physics you are interested in.
Clarity and Presentation: Look for books that are well-organized, provide clear explanations, and present concepts in a way that is accessible to you. Consider your own learning style and see if the author's writing style resonates with you.
Examples and Problem Sets: Check if the books contain an ample number of examples and exercises. Solving problems is crucial for understanding mathematical physics, so books that provide a variety of well-explained examples and challenging problem sets can be beneficial for your learning.
Reviews and Recommendations: Seek out reviews or recommendations from other students, instructors, or professionals in the field of mathematical physics. Their insights can provide valuable guidance in selecting the most suitable book for your needs.
Ultimately, the "better" book is subjective and depends on your individual preferences and learning style. It may be helpful to explore sample chapters or excerpts from each book to get a sense of the writing style and content before making a decision.