Several attributes may be mentioned in one comparison. The special term mixed common feature applies when the actual likeness brings together sensory and conceptual constituents.
Calling someone a sun for radiant appearance may rest on a sensory feature alone. Using the image for high standing may rely on a conceptual feature. Intending both produces the mixed case.
Thus the isolated metaphorical word “sun” does not settle the category. The relevant intended resemblance, as identified from context, determines the classification.