alright. Laser is better then optical. It's like x100 faster so it's better for gamers because your pointer will actually be at where you want it to be. You'll be able to feel the smoothness of it.
The mouse you have on your link is a cordless one. If you're going for gaming stay away from cordless mouses. They suck *** for em.
I heard good things about laser mouses that they're so much better then optical that it'll blow your mind away.