Senior practitioner vs. executive
The CISSP is designed for senior security practitioners — engineers, architects, managers, directors, and yes, CISOs, but also anyone else operating at the senior level of the security discipline. It is the broadest senior credential in the field.
The CCISO is designed exclusively for the chief information security officer role. Its five domains — governance, security risk management, security program management, information security core competencies, and strategic planning and finance — center on what a CISO actually does day-to-day. Executive presence, board communication, budget management, and program-level leadership receive depth that the CISSP touches but does not emphasize.