The schema version is the same - other than a rare exception, we generally try to keep dependency upgrades and database schema migrations to major releases.
That said, I've never personally tried just unpacking the tarball on top of an existing installation. If you want the ability to more easily pull in fixes and upgrade to minor versions throughout a release cycle, I recommend following
Option 2 in our installation documentation - installing from our code repository on GitHub. That way, because we typically keep the dep and schema changes to major releases, to upgrade you can usually just run a
git pull --rebase, restart your services, and be done.