Benefits are better PSU efficiency (~3%) and higher load on same wire size.
Someone told me it would not work (or break) because the 240v of Europe is not the same as 240v in America, his argument was about phases and how the 240 is made from the 3 wire.
Personally I would simply change the breakers, identify the outlets as 240v and take the risk.
What could go wrong ?
he was an idiot. 240 volts is 240 volts. It is often delivered as 3 phased power, but that is irrelevant for the device - basically 3 phase power allows you to transport more load with the same amps, but the phases get split. In my appartement for example we have one phase for the kitchen heavy users, one for the light, one used for the room outlets - with the electricity soon also powering a separate server circuit. 3 phase in, 3x1 phase out. Every device jsut gets one phase, except SOME that are very heavy load and require special cabling (some heave ovens for example take 2-3 phases).