Radio is speed of light. Speed of light through copper conductors is about the same, and over the length of wire you'd have from your mouse to the system, it's an inconsequential difference.
Ignoring interference as u/OneBigMaga points out (astutely!), decoding those signals is where the latency takes effect.
Wired USB mice interface directly with the USB subsystem. Wireless mice with a USB receiver cannot be any faster than a USB mouse. The receiver still has to decode the signals, and if there's any encryption between the base station and the mouse (newish devices almost certainly use AES-128) that will add a few hundred nanoseconds--at least.
It's worth reading this on wireless USB, because it becomes clear why wireless devices are inherently slower and will never be faster than wired.
Radio is speed of light. Speed of light through copper conductors is about the same, and over the length of wire you'd have from your mouse to the system, it's an inconsequential difference.
Ignoring interference as u/OneBigMaga points out (astutely!), decoding those signals is where the latency takes effect.
Wired USB mice interface directly with the USB subsystem. Wireless mice with a USB receiver cannot be any faster than a USB mouse. The receiver still has to decode the signals, and if there's any encryption between the base station and the mouse (newish devices almost certainly use AES-128) that will add a few hundred nanoseconds--at least.
It's worth reading this on wireless USB, because it becomes clear why wireless devices are inherently slower and will never be faster than wired.
He speaks the truth!
Also wired mice don't run out of battery when you're in the middle of tanking the Lich King or something important