«كَثِيرُ الرَّمَادِ» implies the attribute of generosity and thus belongs to kinayah of an attribute. It also involves many steps and thus illustrates talwih. The two labels answer different questions and can both be correct.
«المجد بين ثوبيه» chiefly illustrates attribution. One should not automatically call it talwih or ramz merely because it is a kinayah; that requires a separate analysis of the inference.