Easiest way to see whats better at FPS control...

I don't think whether the mouse is the most precise FPS input method is up for debate. "Better", however, is going to involve each individual user's needs. I'll prioritize comfort over precision any day.

That said, I'm still waiting for a console gamepad to combine a single analog stick and a large optical trackball. Given their relentless obsession with motion controls, I'm fairly certain I'll be waiting a while.

the controller is the best thing for a first person shooter. let me know when u can lay down in ur bed and play with wii mote or keyboard and mouse comfortably.yodogpollywog

Well I have to say that a good mouse and a good enough keyboard are still the best ways to play a FPS and it will probably remain so. It's pretty obvious that the FPS genre was made with the mouse and keyboard in mind.