According to a statement from Neville Upton, head of eSports company Gfinity, Xbox One sales are at 18 million.
Here’s what Upton said in a recent press release:
We are delighted to announce the launch of our Tournament Builder App on Xbox One, which will enhance the Gfinity offering and enable us to reach Xbox One’s 18 million users globally.
Following the press release, Gfinity clarified that the 18 million number was based on figures from independent sources released earlier this year:
Gfinity would like to clarify that it has not sought to confirm Microsoft sales figures. The comments in the statement today is based on a variety of independent sources published earlier this year.
One of those sources is likely ZDNet, who said in early January 2016 that Xbox One sales were around 18 million. At the same time, Sony revealed that PlayStation 4 sales were at 35.9 million, and bumped that number to over 36 million as of March 2016. Also in March 2016, EA estimated that 60 million PS4 and Xbox Ones had been sold.
Since Microsoft isn’t reporting Xbox One sales figures, it’s unlikely we’ll know for sure what the true difference is between PS4 and Xbox One.