Software - Difficulty of programming for ESRAM, reported dev tool and schedule issues. Hardware - The obvious hardware difference that has been known since the official specs were announced.
DR3 and CoD should be running better on Xbox, they have software issues that could be fixed with better code, and it's not entirely a reflection of the hardware difference. You're bizarrely calling something positive I said about Xbox "complete and utter nonsense". Interesting.
MS has never made a statement about Xbox One ESRAM latency improving performance.
Pretty much all of the talk about ESRAM on respected tech sites has to do with bandwidth or ROPs, not latency. All the recent MS claims about hardware has been
"infinite power of the cloud" or
"only possible on xbox one" PR non-statements. Eurogamer interview:
"You're right. GPUs are less latency sensitive. We've not really made any statements about latency."
With greater memory bandwidth they can more easily push 1080p size framebuffers, yes, but it will be the Forza 5 kind of 1080p, lacking advanced IQ. Even if ESRAM provides the bandwidth for 1080p when properly coded, if the GPU can't render it without significantly paring back on IQ or framerate, it's a wash.
PS3 had about 5-10% better hardware graphics performance but was far more difficult to code for compared to 360, so that difference only showed up in exclusives. PS4 has both relatively greater hardware and is easier to code. It's a false equivalence to claim that "it happened with PS3 and 360, so it might happen again this time" while ignoring the known differences.
"Please quote me Einstein." Certainly.
I already made an entire post dedicated to quoting your and neo's special sauce claims weeks ago.