Person A is correct. Having it wired for 240V allows you to use smaller gauge wires.
It won't make a noticeable difference. It might not make any difference at all. Power out = efficiency x power in.
Correction; I-squared-R loss will be 4x greater at 120v, so the efficiency is better at 240v. This is why cross-country xmission lines run at very high voltages.
Only if the same size wire is used and it would have to be a significant length to make a noticeable difference.Voltage drop is also less when wired at 240V.
The reason that high voltage is used for transmission lines is because the higher the voltage the lower the amperage the smaller the wire needed.
The voltage drop and consequently the efficiency factor only come into play with long distance transmission lines where distance and size of wires are concerned. In a hand-held, plug-in tool, there is no discernible difference. Whether it runs on 240v. and 6.5 Amps or 120v. and 13Amps. the power output is the same. P=ExI...! Additional proof is the fact that there is no compensation (for losses) at 120v.!!!:yes::no::drinkon't Drink and Drive!!![The reason that high voltage is used for transmission lines is because the higher the voltage the lower the amperage the smaller the wire needed.]
Is there a way to ban wiki and google links?
Then I'll go with a theoretical difference.no discernible difference