Although there are a few differences between DWS716XPS and DWS779, the primary distinction between the two miter saws is that the DWS716XPS is a tool that works on a durable and efficient Lithium-ion battery.  Contrary to this, DWS779 operates with the help of an electric cable. Moreover, DWS779 is a slightly out-of-budget and costly tool. Also, DWS716XPS is equipped with an illuminating and beneficial LED light that helps to make your work easier.