Microsoft Documents Reveal PS4 Sold Twice As Many Units As Xbox One: Meaning Microsoft likely sold less than 60 million Xbox One units.
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PS4 Has Reportedly Sold a Ridiculous 68 Million More Units than Xbox One
1M PlayStation 4 units sold on 1st day
Court documents reveal PS4 sold more than doubled the Xbox One
PS4 vs. PS5: What's the Difference and Should You Upgrade? - Best Buy
PS4 sold twice as many units as Xbox One, according to new court papers
Should We Really Be Surprised By 'Declining' Xbox Console Sales?
PlayStation 5 and PS5 Digital Edition vs. Xbox Series X and Xbox Series S
Photo history of video game consoles: looking back on the boxes that dictated our social life - Los Angeles Times
The 10 Best Selling Game Consoles Of All Time, Ranked
What Good Were the Video Game Console Wars? - The American Prospect