While they don't know if someone play on PS4, there is a hint to know if someone play with a controller.
Running left and right with side steps and doing backsteps - mostly a keyboard player
Turning the body to the direction of the run - mostly a controller player (legacy control on controller is just so much better than standard control)
That only allow you to spot HDD users. You can change the HDD in a PS4 with a SSD.