There are a couple exceptions but most mechanical gaming keyboard are just regular keyboards. I think the main advantage is the lower prices. Like, cooler master keyboards go for ~$60 to $80. And sometimes plain mechanical keyboards don't have media shortcuts or LED backlighting, if you care about that stuff.
Blackwidow, that new Logitech one, and corsair make 'gaming' keyboards with all sorts of superfluous gamer stuff. I don't see the appeal of those.
I use a daskeyboard silent (brown). I only replaced the caps lock key with a smaller one it's been perfect for gaming or typing or whatever. Though, I have considered a tenkeyless one since I rarely use the number pad.
or you can buy a Mad Catz keyboard with a screen and stuff
