220 versus 110. 220 can sustain a larger motor with less amperage.. On larger tumblers this means that you can use smaller wire to feed it and a smaller amp breaker.. While the watts will be the same, the current is different.
Example:
5000 watts on 220 volts amps = ~23 amps
5000 watts on 110 volt amps = ~45.5 amps
And yes Europe uses 220 volts, but it is 50 Hz and US devices will not always function properly
Power in the US is 60 Hz