Qtile has a set of virtual desktops ("groups" in qtile lingo), and you can display any group on any monitor, rather than having one group that maps to your pair

Qtile has a set of virtual desktops ("groups" in qtile lingo), and you can display any group on any monitor, rather than having one group that maps to your pair of monitors. I find this behavior very handy. EDIT: to clarify, it functions in essentially the same fundamental way xmonad's does.