All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
A highly-capable Cortex M0+ processor with ton more I/O pins, lots of 12-bit ADCs, a 10-bit DAC, 6 total SERCOMs that can each do SPI, I2C or UART (3 are used by the existing interfaces, leaving you 3), plenty of timers, PWMs, DMA, native USB, and more
The ATWINC has much lower power usage, about 12mA for the WINC & 10mA for the ATSAMD21 with auto-power management on for the WiFi and no power management for the ARM.
Stream more reliably (less 'bursty') with the ATWINC.