December 2019 is the 74th month that the PlayStation 4 has been available for. During the latest month the gap grew in favor of the Nintendo DS when compared with the PlayStation 4 during the same timeframe. The Nintendo DS has grown its lead over the PlayStation 4 by 2.86 million units and in the last 12 months outsold the PlayStation 4 by 5.87 million units. The Nintendo DS currently leads by 34.73 million units.
source: gamezpot.com