Im using Goliathus speed and its superb. Control too much friction... lazy wanna use so much energy to move the mouse. Speed glides smoothly + the teflon feet = effortless.

I tried the rough Goliathus, and i didnt like it at all. I prefer effortless movements. And also smooth surface is faster than the rough surface, this enables me to move my cross hair faster. Accuracy doesnt depend on what type of surface, it depends on how close the threads are on cloth mats are. the more and closer the better.