Logitech G502 Lightspeed Vs. Razer Viper
The G502 Lightspeed by Logitech uses an Optical sensor, specifically the Hero, providing a DPI/CPI range of 100 - 16,000 DPI. This is combined with a 32-bit ARM Microprocessor. This results in a tracking speed of 400 IPS, and a maximum acceleration of 40 G. It uses a Wireless, USB connection. It weighs in at 114 g without the cable, has up to 16 g weights and is approximately 132 x 75 x 40 mm (LxWxH).
The Viper by Razer uses an Optical sensor from Razer, specifically the 5G, providing a DPI/CPI range of Up to 16,000 DPI. This results in a tracking speed of Up to 450 ips, and a maximum acceleration of 50 G. with a 2.1 m cable. The Viper is considered to be an ambidextrous mouse. It weighs in at 69 g without the cable and is approximately 126.7 x 66.2 x 37.8 mm (LxWxH).