After being quite familiar with the Arctis Pro Wireless, we were right at home while trying the newer Arctis 9 which can be thought as more cost-effective solution. The up to 20 hour battery life is quite interesting versus the swappable battery solution in case of the Arctis Pro Wireless (which comes with two 10-hour ones) and while the 40mm neodymium drivers are lower-specced in terms of frequency response, sensitivity and THD, the real difference when listening to various audio content will be minimal to non-existent for most individuals.