There appear to me, however two subtler reasons anent the difference between brothers, among the kings-one is evident and another mundane.
अस्ति सूक्ष्मतरं किंचिद्यथात्र प्रतिभाति मा। प्रत्यक्षं लौकिकं चापि वर्तते सर्वराजसु॥