TextField: Use the TextField component when you need users to input free-form text (e.g., names, email addresses, or comments) and when you want built-in form features like labels, helper text, and validation. It’s perfect for scenarios where there isn’t a pre-defined list of options.

Select: Use the Select component when presenting a limited, predefined list of choices. It’s designed specifically for selection purposes and offers advanced customization options (like multi-select or custom icons) without the overhead of input field features.