The distinction cannot be reduced solely to the duty of practice. Every independently established authentic report can carry practical authority, whether or not it appears in either Sahih. Thus obligation to act cannot exhaust the special position of the two collections.
«وَالْإِجْمَاعُ حَاصِلٌ عَلَى أَنَّ لَهُمَا مَزِيَّةً فِيمَا يَرْجِعُ إِلَى نَفْسِ الصِّحَّةِ»
There is scholarly agreement that the two collections enjoy a special advantage with respect to authenticity itself.
The previously stated limits remain relevant: specific criticism by recognized hadith masters and genuine unresolved conflict without preference. Special merit, scholarly reception, and the status of a particular report should therefore be considered together rather than collapsed into a blanket formula.