What is so wrong, both of the GPU's are based on RX 480......As a matter of fact the PRO has some unique features that helps it with rendering, like CBR hardware, RPM and the ID buffer...but on a base level they're both based on the Polaris GPU...
It also makes no sense to speak of bandwidth without presenting the whole picture, because the PS4 has a 20 GBPS interconnect between CPU to GPU...CPU to Memory on top of the features mentioned above (id buffer, rpm, cbr hardware)..all of that that would maximize efficiency on render time.....So real world results....? If all of these features are used should prove very interesting...
Of course I don't expect this Witcher Patch to make use of FP16, but hey, they could use geometry rendering for their performance mode to maximize fps there, so they have many ways to meet their target on the PRO at least...
Tbh, these load times should have never been so awful on the consoles...I've seen Witcher tested on PC APU's with weaker GPUs's than what was in vanilla PS4 and loadtimes were excellent...
But yes, loadtimes, DD, AF and general graphics settings should get a huge boost on top of framerate....I did say should, because I really don''t know what this dev will bring to the table unless the patch is live...So I'm looking forward to see if they improve console settings to PC high-ultra standards....at the very least.