Honestly EndeavourOS is Arch once it is installed. As I have said before, EOS is more of an alternative installer with sensible defaults. 99.9% of the packages installed will be from the Arch repos or the AUR. Even the kernel is vanilla Arch.
I can install Arch. If I am bringing up a new system, I almost always reach for EOS instead. EOS has switched to KDE as the default DE. I still prefer XFCE myself.