Generally, theory is concerned with questions of "why" while methodology deals with "what is".

Question

Quizplus · Accepted Answer

Theory is focused on understanding the reasons behind phenomena, explaining why things happen the way they do, while methodology is concerned with the specific tools, techniques, and procedures used to gather and analyze data, essentially addressing the question of what the current state of knowledge is and how we can expand it.

Generally, Theory Is Concerned with Questions of "Why" While Methodology