According to Albert Penello, Microsoft's Director of Marketing, the power difference between the Xbox One and the PS4 "is not as great as the raw numbers lead the average consumer to believe." In addition, Larry Hyrb said that what his colleague is true and continued on to say that he is "very much looking forward to the next few months (and beyond) as the truth comes out" regarding the power differences between both consoles.
In a conversation on NeoGAF, Penello discussed both consoles architecture, and said that the slight difference between both consoles brings the two systems into balance, and claimed that if there was any significant difference in power it would be obvious. The director continued on to say "there is no way we're giving up a 30%+ advantage to Sony. And ANYONE who has seen both systems running could say there are great looking games on both systems."
Regarding the fact that people say that the PS4 is more powerful due to the system's superior GDDR5 RAM and GPU, Penello says that this is nothing more than a "war of words over performance" that happens in every console generations. "I get a ton of hate for saying this "“ but it's been the same EVERY generation. Sony claims more power, they did it with Cell, they did it with Emotion Engine, and they are doing it again. And, in the end, games on our system looked the same or better," said Penello.
The Xbox One is scheduled to release on the 22nd of November in 13 countries, arriving at the rest of the world in 2014. The PS4 will be released on the 15th of November in North America, arriving at Europe two weeks later, on the 29th of November.