http://youtu.be/8h7_Xa5jxWk
The video above shows me setting up a router between two computers that I then showed had a connection to the router, thus meaning that the two computers can now "directly" communicate with each other and in this case, play CounterStrike.
Wired and wireless transfers of data at close proximity to the server and router being used probably would not differ greatly in the speed at which the transfer occurred. If you were to increase the distance however, the wired connection would outshine the wireless connection and have the data transferred in a much shorter period of time. There are other variables that affect the transfer speed though, such as the network traffic. If there are more users on a wired network than a wireless network, chances are that the person on the wireless network will have a greater bandwidth and would transfer the data much quicker than their wired counterpart. However, the speed of the transfer means nothing if the entirety of the data is not present after the transfer. A wireless connection could drop out and some of the data packets could become corrupted or lost because of this, whereas someone on a wired connection would generally not have to deal with this issue.
Overall, data transfer over either a wired or wireless network is effective, though there are too many variables to determine which one is more effective at any given time. As seen in the video above, the pings performed by both of the computers presented virtually the same results with the only difference being a 1ms delay on the response which wouldn't be noticeable anyway.
