Hi,

The original question is formulated in a way that allows no answer that makes any sense.

The "electricity getting it's job done" is not the issue.

Hence to ask like that suggests a profound ignorance of basic principles.

To answer the question would require a year or two worth of EE study material compressed into an answer.

As posed the question has only the answer "there is no variability per se to the way "electricity get's it's job done", but there are many parasitic and otherwise undesirable effects that account for differences, outside the basic variability of voltage and freqency, which in themselves of course can have an audible impact as well.

Ciao T