EndeavourOS
EndeavourOS is a rolling-release Linux distribution based on Arch Linux. The project aims to be a spiritual successor to Antergos, providing an easy setup and a pre-configured desktop environment on an Arch base.
VS
OpenMandriva Lx
The OpenMandriva distribution is a full-featured Linux desktop and server, sponsored by the OpenMandriva Association. It was based on ROSA, a Russian Linux distribution project which forked Mandriva Linux in 2012, incorporating many of Mandriva's original tools and utilities and adding in-house enhancements.