i'm choosing between razer deathadder v2 wired and wireless
Some stats...
Deathadder V2 PRO - 88g
Click Latency: Wired: 3.0 ms; Receiver: 3.8 ms
Movement Delay(Sensor): To Start: 14 ms; At Half: 5.7 ms; To End: 7.1 msDeathadder V2 - 80g
Click Latency: Wired: 2.6 ms
Movement Delay(Sensor): To Start: 12 ms At Half: 4 ms To End: 5.7 ms
You'd expect a somewhat lower latency response if you went with the wired version, though to be honest, it's already fairly low to begin with (between the two). The PRO version, on the other hand, would allow you to play wirelessly, which is a deal breaker for some, at the cost of an extra 8 grammes of weight and twice the price of the wired version.
As an alternative, you might always choose Deathadded v3 PRO, which is a tad superior version of the Deathadder series to date.
Source: Rtings.com
I agree with that one guy above that said wireless mouses might give cancer because i used to use old wired mouses and nothing was wrong but after i got my first wireless mouse i noticied i suddenly had a strong urge to by really long socks that had stripped blue and pink patterns on it, like i dont know really why but now i wear them all the time and theyre super comfy!:3