A point release is not a separate, new version of Kicksecure. Instead, it is a re-release of Kicksecure which is inclusive of all updates up to a certain point.
Installing any version of Kicksecure 17 and fully updating it leads to a system which is (mostly) identical to installing a Kicksecure point release.
If the Kicksecure installation is updated, no further action is required.
Regardless of the current installed version of Kicksecure, if users wish to install (or reinstall) Kicksecure for any reason, then the point release is a convenient and more secure method, since it bundles all Kicksecure updates that are available at that specific time.
To determine whether an update or image re-installation is better, see: Update vs Image Re-Installation.