As mentioned in my other posts, the big difference is the second set of virtual desktops that's afforded by a second monitor, as well as physical prioritization

As mentioned in my other posts, the big difference is the second set of virtual desktops that's afforded by a second monitor, as well as physical prioritization of secondary, tertiary, etc windows. It also means you have a far wider selection of models at your disposal for both screens – in my case I like my primary monitor to be HiDPI while the secondary monitor can be a more run of the mill 1440p 27" monitor that you might find at a yard sale.