I didn't notice any additional lag. Sometimes with a 100 people in the starting area there is some lag but once everyone is dropped on the island it seems to run pretty well. The pc person could technically have an advantage but with this game you have the choice of mouse and keyboard on the PS4 as well so technically the PC and PS4 players have the same options for controls b/c you can use a controller on the pc as well. So it's really only limited by the control scheme you choose since both platforms support mouse and keyboard and controller