come on, this one is a no brainer. there's just no way that you're going to match the speed and precision of a mouse compared to the clumsy, auto-aiming joystick. the difference is just amazing when you compare the exact same game on the PC to any console.
the difference becomes even more apparent when you get into multiplayer where speed and precision become that much more important. nabbing a headshot on one person and quickly turning around because you're taking damage from the rear borders on the impossible when it comes to consoles.
so, yeah, no contest: mouse and keyboard pwns joysticks (aka, consoles).
See the struggle of the faithless lot as they negate their time
How low to sink to the depths of their frame of mind