Seems to be revealed here
Looks to be legit information; I have no problem believing that these specs are either nearly accurate, or entirely accurate.
The first thing I actively searched for and noticed, was system memory. With all other things being nearly equal, the one major difference between the PS3 and the 360, came down to the less system memory for the PS3. This wasn't a major deal until a game like Fallout New Vegas and Skyrim and the 360 version ran a lot
better, with the DLC for Skyrim in limbo for ages on the PS3 s result. Now Sony has less memory, but it is a bit faster than what Microsoft will be using, so it will be interesting to see what developers end up preferring - faster or more. The article, like others, leads one to think the PS4 will be the superior system, but I'm not convinced that the less RAM will be preferable. Ultimately, it all comes down to how many desirable games are on the system, especially at launch. Microsoft really needs a few new appealing looking franchises; they've lost the exclusives that they once had long ago.