@
wastedkill and @
GhostRyder
Your both forgetting that the Kinect also takes 10% of the GPU power away automatically, so the clock boost on the Xbox was a compensator for the Kinect.
384 core difference between the two GPU wise (PS4: 1152 Xbox: 768 Cores, Same architecture)
The CPU core count is 8 on both consoles, 6 available to games.
Xbox One is clocked at 1.75GHz vs PS4's 1.60GHz
PS4 GPU clocked at 800MHz vs Xbox One's 853MHz
Now the facts are all in one list this makes everything a little easier xD
So lets compare the closest PC parts for the GPU's:
Xbox One = Radeon HD 7790 (896)
PS4 = Radeon HD7870 (1280)
This is the same 384 core difference, just for arguments sake, here's a Youtube Video of Crysis 3 on High, 7790 vs the lower 7850:
Clearly Microsoft could have really done with a bit of extra power in the GPU department, video's online don't do it justice due to HDCP issues on the PS4, but I am one of the luckier people who has seen the PS4 and Xbox One play BF4 side-by-side, the Framerates seem pretty much the same to me on both sides, Graphics settings seem to be very similar, but the resolution was a massive bug bear to me on the Xbox, Guns in particular just had soo many jag-idies it wasn't even funny compared to the PS4 version which overall looked much smoother.
Now CPU, this is where GhostRyder can have some brownie points xD
The PS3 Cell processor was extremely hard to program for, It took years for developers to crack it, but once they did, just look at games like The Last of Us and Gran Turismo 6, They look very good for such an old console, the key was in the CPU power, not the GPU power, if you want some specs, the PS3's Cell Processor runs at 3.2GHz and has 7 cores, 1 core was reserved for redundancy during manufacture.
Xbox 360 similarly, but was much easier to program for and bring the best out of, hence why cross platform games were generally better on it.
Now to the PS4 and Xbox One CPU's, they now both are the same architecture and same core count with the same limitations, only difference is 0.15GHz difference on the clock.
Since they are comparable to PC hardware, and they are AMD CPU's, I don't think such a small clock difference is going to make much of a difference and (this is just theoretical now) Since the Xbox One OS is using the Windows 8 Kernel, a customized version of DX11 & Kinect services, this might create a little more overhead compared to PS4's custom built OS and 2 different API's, one's similar to OpenGL, the other is far more bare metal programming.
Now Memory, this is a tricky one, because yes, The PS4 has GDDR5 and yes the Xbox has ESRAM to make up for the bandwidth loss using DDR3 BUT, unless I can't google very well, I cannot find how much bandwidth the Xbox One has to the CPU.
The PS4 has 20GBps link speed between CPU and memory I Believe, the Xbox I have no clue, this could be it's greatest weapon though, if you can feed the CPU more data, the more that can be processed, this could give it the advantage over the PS4 CPU purely because they can use more of it, in the long run, say 5 years down the line, this could mean Xbox One and PS4 cross platform games look very similar, just the PS4 has a resolution bump.
Overall, the PS4 does have a power advantage, in a year or two and most cross platform games, we'll find the PS4 has either smoother framerates or looks substantially better on a 4k monitor over the Xbox, but it will never end up like the Wii did in the last round, the PS4 doesn't have enough extra power to completely dwarf the Xbox and memory reserved for the OS can change on both platforms over time, it did for the PS3 and I believe the Xbox as well, so why not the new gen?
Conclusion, If I was to give it a number, which I don't want to do, because we haven't seen any game really test both consoles substantially yet, PS4 probably has anything from 20% to 5% performance lead over the Xbox. This is my Opinion based on what I've read, seen, played and calculated, Basically, there's not a whole lot in it at the end of the day.
Anyway, I don't really care and have purchased neither, I'm waiting on a game that grabs my attention, if last gen is anything to go by though, the PS4 may be my purchase purely because I've had more fun from the 1st party devs Sony own, over Microsofts. That's just my opinion, not fact. I'll probably be waiting a while as no set dates have been made on any games that interest me yet :/