Antergos started life in 2012 as Cinnarch, offering Cinnamon desktop with Arch Linux. It changed to Antergos after the developers opted for GNOME 3 as the default desktop and retained Cinnamon along with Openbox, Razor-qt and XFCE as the other DEs in offer. It has the same rolling release development model as the parent Arch Linux. Given I never liked Cinnamon, I didn't try out Cinnarch.