Of Keohane's two optics, which is more important to a nation's interests, reputation, and institutions and how does Franck's four variables affecting legitimacy compare to Keohane's two optics?

Reference:

- Keohane, International and International Relations: Two Optics, Harvard International Law Journal, Vol. 38 (Spring 1997), pp. 487-502

- Franck, Legitimacy in the International System, American Journal of International Law, Vol. 82 (1988), pp. 705-59