Given the same inputs, the results for each calculation are remarkably different, thus I’m not sure which one to use as a guide for tracking calories. Since EER is defined as the “energy intake that will maintain any individual’s body weight” and is mentioned on government websites rather than TDEE, I have been using it.
It sounds like you’re focusing on EER (Estimated Energy Requirement), which is the energy intake to maintain body weight. For tracking calories, EER from government websites can guide your dietary choices. Combine this with balanced, whole foods for a sustainable approach to your diet.