As for all arch-based distro’s is basicly close one is more vanilla then the other other is mayby better configured.
Manjaro is also a different beast as package base does use the same system.
but brings multiple different kernels that can be confusing also because it has all different names. also for grub systemd and some tools are there own.
as it can be user friendly but can be confusing as comes to kernel updates. As Arch more kiss as a way then manjaro, because it brings not so much different kernels standard also if some new comes up you get automatically thats not with manjaro the case, they use lts as base but if you want something new you have to change. on kernel base they used also to bring the edge on kernels in unstable but is also an option.
There is no best distro at the end. as arch as endeavouros except EnOS brings a easy installer on some part want to keep it simpel in a way you can learn the patch of the arch aswell. without confusing multiple packages or kernels. there is no right answer what is good or bad 