ArchLinux is rather hard to install using command line. Antergos's advantage is the easy installation using a GUI. So instead of manual installation of software you can just download Antergos which does things for you automatically.
Rolling release is quite a pain sometimes. You might face some problem with a bugged application since you always get the latest version. This problem is a little bit solved by Manjaro distro where applications are tested but updates are slower than usual.
KDE is probably the best looking Desktop Environment in all OSes. It easily beats all Windows (but then again so do many) it beats Cinnamon and one could say even OSX in looks and flexibility but not in stability.