When comparing XBPS (X Binary Package System) vs RPM (RPM Package Manager), the Slant community recommends XBPS (X Binary Package System) for most people. In the question“What are the best Linux package managers?” XBPS (X Binary Package System) is ranked 4th while RPM (RPM Package Manager) is ranked 5th.
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Pros
Pro Extremely fast
Pro Can detect incompatibilities
XBPS can detect incompatible shared libraries or dependencies and gives you options before installing.
Pro Can install binaries or build from source
When installing software you can choose to install binaries or build it from source (natively or cross-compiled).
Pro Lots of features
XBPS can not only be used for installing/removing packages, but it can query for package info (such as version, dependencies, size etc), reconfigure packages, report and fix issues by modifying the package database, search for alternatives, manage local repositories and various other useful tools.
Pro Allows partial updates
Pro Written from scratch
Pro Easy to create packages on non-rpm based distros
This makes maintenance and support easy.
Pro Follows the UNIX philosophy
It only does one thing and that well.
Pro Part of LSB
It is part of the Linux standard base.
Pro Very easy to create packages
It is very easy to create packages for it, you just need a small spec file.
Pro Standard archives
RPM packages are simple cpio archives that have additional compression support.
Pro Much more advanced than apt
Cons
Con Not just one command to run
It's not a very big drawback, just not as convenient as one command with multiple options to remove and search for apps.
Con Unable to create packages under a non-xbps distribution
Makes maintaining packages a hassle.
Con No interaction
RPM does not support user interaction upon install.
Con Many forks
Currently there exist rpmv4, rpmv5 and distribution specific forks like Mandrake's urpm.
Con Plenty of different frontends
Almost any rpm distro has its own frontend for rpm there is zypper, yum, apt-rpm, dnf, poldek and many more.