But the thing is that you are not specifying what “level” you really are referring to. Almost all of us interpreted as of level of gameplay, that, while more convenient input methods will definitely assist you in better gameplay, it does not necessarily correlate to the skill of the player.
In other words, there are a lot of console players out there that will beat a lot of PC players with ease, because they are more experienced.
BTW both me and Scar played this game fully on controller. And while we both agree that Mouse is better for aiming, anyone here can attest that we were playing really good, above even the average PC player on K&M… WITH A CONTROLLER.
Like I said… “No es la flecha, es el indio”

