What do new and old brake pads look like?

New brake pads typically have a thick, smooth surface with a consistent color, often darker or more vibrant depending on the material. In contrast, old brake pads usually show signs of wear, such as thinning, uneven surfaces, and a lighter color due to friction. They may also exhibit cracks, glazing, or a buildup of dust and debris. Overall, new pads appear robust, while worn pads look significantly diminished in thickness and structural integrity.