Unless i'm missing something with only a quick look none devs in that link (even the mystery "anonymous" one which for all we know could be a sony employee) with the exception of the need for speed dev said a game actually looks better on PS4 than on X1, they just comment on the relative power based on GPU and DDR5 stuff we already know. In fact one comment from a dev in that link is quite telling...
Misinformation or did I miss something?

On first glance it doesn't look like "But several third party devs have already gone on record saying that with their games one version will look noticeably better".
No one is disputing the PS4 is more powerful, the question is what real world difference will we actually see, which is all that's really important.