I read some of the Release Engineering pages but still not sure which is easier to use while not having serious shortcomings. Is it like comparing apples and oranges?
After several months, and the number of changes in the stable/ branch have grown significantly, it is time to release the next version of FreeBSD. These releases have been historically referred to as "point" releases.
In between releases from the stable/ branches, approximately every two (2) years, a release will be cut directly from head/. These releases have been historically referred to as "dot-zero" releases.