Based on the confirmation of what I was saying before and DF's sources/article, it turns out there is no advantage whatsoever for Sony's GDDR5. At all. Literally nothing. It costs more, won't price reduce as quickly, devs get the same amount for games/OS as on X1, and it wasn't enough to boost PS4's bandwidth to the CPU or GPU above X1's setup. Oh, and not that it is problematic, but it also has slightly more latency than X1's DDR3 setup.
Shame we didn't get specific clocks here (even though we know it's 853 MHz for GPU without the Hot Chips info). I'm curious if the CPU clock is still 1.6 GHz or if it also got bumped up to 1.706 GHz.
Seems to come down to X1 having a slightly better CPU (possibly), higher bandwidth to CPU/GPU, DMEs/display planes, and its array of 4 audio processors...compared to PS4's GPU with more raw flops power. Not anywhere near as lopsided as the Sony fanboys have been proclaiming since January.