I installed the Vysor Chrome app on my Win8 PC. Its very slow and laggy when using it with and LG G4 v6.0 making it un-unsable, but when using it with a lower brand phone its way faster. I connected it with an LG Vot2 v5.1 and it couldn't tell a lag.
Not sure if its because of the pixels and causing a issue with the refresh rate with in Vysor or if its something else.