PlayStation 2 is the highest-selling home console of all time with over 155 million units sold in its lifetime. While it will be difficult for any current or future console to pass that number, early in its life PlayStation 4 is actually selling at a faster rate than its record-setting predecessor. PlayStation 4 sales recently broke the 20 million mark, and it did so in less than 16 months on the market. During the same time period in its life, PlayStation 2 had only sold about 15 million units.
Of course the two systems had different launches. PlayStation 2 debuted in Japan and didn't release in North America and Europe until seven and eight months later, respectively, whereas PlayStation 4 launched in North America and Europe first and in Japan four months later. Even so, PlayStation 4's hot start is extremely impressive. You can check out a chart comparing sales of the two consoles by clicking below!