I gurs wurt im asking is whats the difference between USA 220 and rest of world 220?
Most of the world uses a single phase 240v. So you have a single 240v wire and a neutral at 0v. Electricity is all about voltage differences. So if you connect a 240v wire to a 0v wire, you get 240v. If, for example, you had a 240v wire and neutral was actually at 15v for some reason, connecting them would give you 225v.
The US uses a split-phase(or two phase) 120v system. You have one phase at 120v, one phase at -120v, and a neutral at 0v. If you connect either one of the phases to neutral you get 120v. But if you connect one phase to the other you end up with 240v difference.
Obviously AC means the the phases are alternating. So the rest of the world the phase flips from 240v to -240v. In the US the phases flip between 120v and -120v, but they are always opposite of each other, so they is always 240v difference.
Only frequency: 60Hz USA, 50Hz most other places.
It's more than just frequency.
Not really. A 15 amp single phase can just barely deliver around >1600W, but your pushing it pretty hard. And I doubt the cables included are of sufficient gauge for more than 1300W, as mentioned.
Then there is the fact that 20A circuits exist.