Someone let it slip that the Xbox One has sold 18 million units so far worldwide since its 2013 release.

That someone was Gfinity head Neville Upton, who released the number in a press release about a new eSports app for the Xbox One.

"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," he wrote.

Gfinity, though, informed IGN that these numbers were not confirmed by Microsoft and made the following statement: "Gfinity has not sought to confirm Microsoft sales figures. The comment in the statement today is based on a variety of independent sources published earlier this year."

One of those reports came earlier this year from Microsoft analyst Mary Jo Foley, who also estimated that Xbox One sales were at 18 million.

That's an impressive number, at least until compared to the number of PlayStation 4 sales that comes up: at the end of 2015, reports stated that the Sony console sold over twice as many units: around 40 million.

This isn't an official report from Microsoft, though: the company hasn't released any official sales data for its console. Earlier this year, though, EA slipped details that the Xbox One sold around 19 million consoles, which is keeping in line with the new number.

Rumors speculate that both companies plan on offering upgraded versions of their consoles soon, giving the current systems better specs for gamers who might demand better graphics and more performance from their machines. As it stands, though, PlayStation 4 is still winning the console race, although in the end, it's gamers who win, thanks to the choices both consoles offer. In general, the console market is doing better than ever: total sales for both systems are moving faster than the previous generation of consoles.

The PlayStation 4, though, has a great year planned: not only will players get exclusive releases such as Uncharted 4: A Thief's End, No Man's Sky, Gran Turismo and The Last Guardian, but PlayStation VR will bring virtual reality to the console in October. This will make the PlayStation 4 hard to beat on the gaming front: the Xbox One just doesn't have as many exclusives that players want, especially with some of the Xbox One exclusives also becoming available as PC games for Windows.

The Xbox One retails for around $300, with the PlayStation 4 coming in at around $350, meaning that price isn't an issue when it comes to choosing a console. Most hardcore gamers, though, will probably own both.

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