December 2018 is the 62nd month that the PlayStation 4 has been available for. During the latest month the gap grew in favor of the Wii when compared with the PS4 during the same timeframe. The gap increased by 388,000 units in the last month. However, in the last 12 months the PlayStation 4 has closed the gap by 6.52 million units. The Wii currently leads by 1.77 million units.
Both consoles launched in November. The Wii launched in November 2006, while the PlayStation 4 launched in November 2013. The PlayStation 4 has sold 91.62 million units, while the Wii sold 93.39 million units during the same timeframe.