Both eSRAM and GDDR5 are used in the same way... there is no difference in use of eSRAM because it is not a cache... I think you are confunsing with the eDRAM found in 360.

You don't have a caching of data in eSRAM but instead you you it to write information that you need more fast than what DDR3 give you... to be fair all devs will try to use it to store the framebuffer if the game will try to reach 60fps... use the DDR3 to store a framebuffer for 60fps won't work for this gen... PS4 store the framebuffer on GDDR5.

No it isn't. To simplify it for you: The 4*8Mbyte esram is NOT an accelerator for anything, it is NOT a cache. The reality is a lot more complex (there is a reason why you see a third block of esram on the SoC dye and why the cpu cannot directly poke the esram blocks).

what do you think are the move engines in combination with eSRAM and DDR3 good for then? of course eSRAM is going to be used like a GPU cache. its not SRAM for nothing. i mean, we can of course discuss now if it has to be called a cache or like the name says, embeded static ram. if i call it a programmable gpu cache, i am not too far off.

-> http://www.extremetech.com/gaming/171735-xbox-one-apu-reverse-engineered-reveals-sram-as-the-reason-for-small-gpu they call it cache
http://hothardware.com/News/Developers-Claim-Xbox-One-Much-Weaker-Than-PS4-We-Evaluate-The-Evidence/ they too btw.
-> http://www.eurogamer.net/articles/digitalfoundry-the-complete-xbox-one-interview this article states that its very similar to eDRAM

Edit:
-> http://semiaccurate.com/2013/05/22/microsoft-subtly-admits-losing-with-xbox-one/ even though this article is a little outdated (may 22, 2013), it has a great understanding of x1s architecture (eSRAM again called a cache)

Exactly just like when they said they couldn't get rid of the DRM cause it was in the hardware.

But there is also no way this is possible. Sorry its just not going to happen "Double performance". 

I'm hoping this secret sauce crap finally goes away, so people can just focus on the games as thats what it should be about. This whole performance fallacy and people falling for it, is sadly depressing.

I also dont agree its x2. Thats exagrated. But along with Phils comment its like PDZ - Halo 4 there is a significant performance gin using DX12. 

This isnt some secret sauce, like some chip not switched on inside the xbo one. This is a PROVEN enhancement to the direct access and control over the core of the hardware. When all is sai and done this is good news for XB1 in terms of great story visuals and cinematic gameplay. There is a dfinite performance gain using DX12 over 11 for Xbox One. First party tites will be benefit mostly as they only have to build one version of the game. But 3rd parties probably for a couple of years will still choose the easier option of DX11. Some like Ubisoft or EA wit more funds may dabble into DX12 though. But I expect Forza 6, Halo 5 etc to be sporting the better DX12. Maybe even Quantum Break will have beeen shifted over to DX12.

Did you really see a user posting sony won't improve their game?... i smell bullshit

so the whole fanbase needs to have exactly the same opinion and views.... great way to generalise a fanbase!

Deep down inside the Xbox fans really only wanted to hear that their side won. Everyone wins if great GAMES are on the console. The Xbox One has a lot more things about itself to work on. Microsoft should be focused on trying to out create Sony rather than trying to beat their specs once the console is already out. Problem with the PS4 this gen is that Sony has them covered on a first party and a hardware front and Microsoft just hates that. All Microsoft needs to focus on is their competitive games and getting other fun new IP's on the console and they'll be fine. People should've figured it out from the start when they saw Micosoft scrambling to fix their clock speed once Sony got better hardware under their belt that Sony had them beat where it counted pre-launch. Its time for Microsoft to fight back post launch with games and nothing but those.

Eh, no. It is common knowledge that DX9 gives a higher FPS than DX11...... Your one benchmark for ONE game does not make a fact. I am not arguing that DX9 is better than DX11, DX11 is better overall but DX9 is still the better in terms of performance.