Vanilla OS
Vanilla OS, a fixed-release distribution based on Debian (formerly Ubuntu, prior to version 2) with the GNOME desktop, is an immutable operating system. The core parts of the system are locked down to prevent unwanted changes and corruption from third-party applications or a faulty update.
VS
MagOS Linux
MagOS Linux is a Russian desktop-oriented distribution based on ROSA, a distribution that was forked from Mandriva Linux in 2011. It uses the RPM package management.