From what I can find on their website, it looks like the difference between the nylon and smooth is that the nylon is a cloth type surface and the smooth is a poly surface, whatever that is supposed to mean.
NinhalemI have the nylon wrist pad, 60% size, thinking about getting this for my ErgoDox.
The nylon surface is very permitting in terms of how moist your hands naturally are, they don't get "stuck" by the friction, nor do they sweat, due to the breathable cloth-like surface. But the pad does have this cheaper look, especially because of how the logo sits on the material, which is why I'm considering getting the smooth version, but afraid that it will not allow for prolonged sessions and will cause sweaty hands. Can anyone confirm this?