Why you’d buy the old DeathAdder mouse from Razer is anyone’s guess, especially since the new one is twice as powerful and costs a mere $10 more.
The Razer DeathAdder 2013 features a 6400dpi 4G Optical Sensor. Last year’s model boasted a by comparison simpleton 3500dpi Razer Precision 3.5G infrared sensor. So you see, it not only sports almost twice the dpi, but it now has an optical sensor. Also included are zero-acoustic ultraslick mouse feet, a gold-plated USB connector, on-the-fly sensitivity adjustments, a seven foot lightweight braided cord, and a design that is only compatible with right handed gamers (there is also a lefty version, just make sure you choose that). It’s also compatible with Razer’s Synapse 2.0 service, which syncs your mouse with the cloud, and automatically downloads the necessary drivers, firmware updates, as well as save individual settings without you needing to “lift a finger”.
You can buy the Razer DeathAdder 2013 for $70.