they are definately 2 different switches and not just with a simple difference of the sound though. The switch is built differently so that in the blue, there are 2 levels of pressure you apply before the key is detected. The first one lets you push about 1/4 of a cm down, then after that the click comes. There is definately a little bit of force required to press through that click, and then it makes an audible tactile noise yay! For the browns, you press about 1mm down, and then you hit the pressure point where you have to press a little bit harder to get the key to be detected by the keyboard. Its just a direct up and down. Definately a difference.