Marty01What is the advantage of optical switches? Do you know?
davidechenin my opinion for the simple fact the g915 is wireless ide say go with the z20. Dont see how people and companies label "Gaming" onto WIRELESS hardware due to the latency, even if minimal. everything adds up in the end, from monitor to mouse to keyboard latency... all adds up. ive always said if you can avoid extra unnecessary latency then avoid it. As far as what your interpretation of "better" would be, i would say it would depend on what you intend to use it for. Since you didnt specify its hard to tell. For someone that uses the computer across the room maybe wireless would be considered "better" to them.