As a user, advisory version is considered at conflict resolution time
Currently advisory conflicts resolve according to #4295 which is based on updated timestamp and package list difference.
Some advisories don't have updated timestamp but they bump advisory version in case of changes. (e.g. openSUSE ones). RH/Fedora advisories bump version as well but not for all changes, so it's not possible to switch to using version only for conflict resolution.
Version of advisory should be taken into consideration at conflict resolution time.
Updated timestamp has precedence.
When updated timestamp is absent or the same for both advisories, advisory versions should be compared.
The higher the version is, the newer the advisory.