Ubuntu is more stable because Arch does rolling updates. I’ve never had Arch break though and use it as my main driver. Ubuntu and Manjaro are more user friendly in the sense that they have software managers where you can click to install and uninstall. They’re both also easier to install in the sense that you’re not doing any partitioning. I had to do manual partitions to do the Arch install script (probably because I had flags from an old OS), but it worked fine after that.
With Arch you have to get familiar with Pacman and the command line a bit; you’d go to the terminal and type “sudo pacman -S firefox” to install Firefox, for example. You also need to install networkmanager and use systemctl start/enable to get wifi running well. It’s all in documentation.
Arch and probably Manjaro are better for a system where you’re messing around with desktops, programs, etc. because the package dependencies are more clean for adding and removing. Ubuntu/Mint are good for just getting something running with whatever desktop it ships with. The choice really comes down to how much anger and annoyance you can tolerate.
