February 2018 is the 12th month that the Nintendo Switch has been available for. During the latest month the Wii has closed the gap with the Switch slightly. The Wii outsold the Switch by 163,341 units. The Switch is currently ahead of the Wii by 1.85 million units.
The Wii launched in November 2006, while the Nintendo Switch launched in March 2017. The Switch has sold 15.33 million units, while the Wii sold 13.48 million units during the same timeframe.