The job of Combatant Commander and CNO are very different. The CNO measures success by improving the structure and policies of the USN in both personnel and equipment. Winning the inside the beltway knife fights over money and influence is a function of who you know and how well you can work the system. Adm Franchetti has a better resume than Adm Paparo in this regard. That is not meant to diminish the record of Adm Paparo, just to note that he excelled in effective utilization of naval power, not in its acquisition.