For the Speed comparison, I turned the DeathAdder to 3500 DPI with the goal to see if the mousepad was still readable. The good news is the Razer DeathAdder picked up the Hiro and I could barely keep track of where the mouse went. The worst surface was the desk - I almost had to pick up the mouse before it moved off the desk. There is not much to this observation, but just remember fast is good because you can always turn down the sensitivity. On the other hand, if your mouse does not pick it up the pad in the first place, then that becomes a problem. I find myself leaving the DeathAdder at 1800 DPI and making slight adjustments in game. If you are playing a real-time strategy (RTS) game, a low DPI might suit you better, but I've also known a few people who max out the DPI so they don't have to move their hand basically at all.