"To add further insult to injury, the amount of time your pump runs to circulate the water will also double (compared to a pump in a 220-volt system)." WRONG! The typical, dual voltage, AC(single phase) electric motor, when attached to a pump, runs at the exact same RPM and HP (https://spicerparts.com/calculators/horsepower-torque-calculator), wired for either voltage. The only thing that will change, is the current draw, which will drop by half, at the higher voltage. ie: https://www.youtube.com/watch?reload=9&v=3llc68VvzsY Notice here, that though the motors are all dual voltage; only one RPM is mentioned for all and one HP rating for each, in the specs: https://www.poolblu.com/Public/pbsShowFamily.aspx?xFM=FM043298&xCT=
100v,115v versus 230v
Some audio technicians/ enthusiasts claiming that, high end audio equipment performs much better european 220/230v even 240 UK voltage if that's the case why USA 110V / 120 volt AC ?