I have connected my TP LINK router to my Virgin SuperHub cause the Virgin SuperHub wireless is not so good, But all the TP LINK Router has done is added a 1 bar signal strength. So if i got a 20m long Ethernet Cable Stretched all the way up stairs for the TPLINK to be closer, and then Connected wireless to it, Would that make any difference because its running on a 20m Cable then wireless. Its Closer for wireless but it be running through a 20m Cable.
Would your mobile work better than your landline telephone in the case of bad signal? No...because...wires.
wired > wifi