Considering that max-age applies to all the caches, and s-maxage only applies to shared caches (proxy and gateway cache)....
Does it make sense to use both directives in a non-expirable and public page?
w = Response();
14.9.3 Modifications of the Basic Expiration Mechanism
If a response includes an s-maxage directive, then for a shared cache (but not for a private cache), the maximum age specified by this directive overrides the maximum age specified by either the max-age directive or the Expires header.
Note, "overrides". So, it would only make sense if you intend to specify a different maximum age for shared caches as compared to
max-age, which would be used by end users.
In your particular example, they're the same, so specifying
s-maxage is just unnecessary.