How to see or understand the tree of repositories?

Question

linux

Tell me who knows, if we have two repositories, "A" and "B"
and each of them has a "vim" package,
which one will be selected?
Do the repositories overlap each other, if so, how?
interesting about Deb and Redhat families

Answer 1

There are preferences for apt (/etc/apt/preferences.d/ now), if not configured, then the package with the highest version is installed.