The XM1 by EndGame Gear uses an Optical sensor from Pixart, specifically the PMW3389, providing a DPI/CPI range of 50 CPI to 16,000 CPI. This is combined with a ARM STM32-based chip. This results in a tracking speed of 11.43 m/s (450 IPS), and a maximum acceleration of 50 G. with a 185 cm, Black Flex Cord cable. The XM1 is considered to be an ambidextrous mouse. It weighs in at 70 g grams with the cable and is approximately 122.14 x 65.81 x 38.26 mm (LxWxH).
The Viper Ultimate by Razer uses an Optical sensor from Razer, specifically the Focus+, providing a maximum DPI/CPI of 20,000 DPI (Default stages: 400/800/1600/2400/3200). This results in a tracking speed of 650 ips, and a maximum acceleration of 50 G. It uses uses either a Wired and Wireless connection with a 1.8 m cable, which is used for charging or cabled use. The Viper Ultimate is considered to be an ambidextrous mouse. It weighs in at 74g without the cable and is approximately 126.7 x 66.2 x 37.8 mm (LxWxH).