I wouldn’t worry too much about the package manager, just worry about whether the distro has a good package repository.
download/updates fast and reliable. Also when watching git repositories for new software alternatives, you e.g. see often packages for good package managers, whereas you need to go some extra mile for “stable” package managers.
But I would say these are not features of the package manager software, rather they are features of the package repository, that is, the online service that provides the packages. It doesn’t matter if you use Apt, DNF, Pacman, if the package repo is slow, fully of packages that haven’t been built right, the package manager software won’t do much to make it better.
But like I said, a few package manager are really unique, like Gentoo Emerge, Crux Prt-Get, and Nix and Guix.