December 2017 is the 10th month that the Nintendo Switch has been available for. During the latest month the Switch has retaken the lead when compared to the first 10 months of the Wii. The Switch outsold the Wii by 3.47 million units. The Switch is currently ahead of the Wii by 2.11 million units.
The Wii launched in November 2006, while the Nintendo Switch launched in March 2017. The Switch has sold 13.36 million units, while the Wii sold 11.25 million units during the same timeframe.