Every multiplatform game performs better on a PC with those specs. What is your problem? If The Order or Bloodborne would have been released on the PC they would ALSO perform better on the PC with those specs. Is it that hard to understand?
This isnt necessarily true. Until dx12 and opengl next there is still one performance trick up a the ps4s sleeve. That is their much more efficient compute solution. It possible that the order pulls off more complex compute work than could be possible on a 750ti without dx12.
That being said eventually dx12 and open gl next will be here and we will have parity and in all likelyhood, at that time, this setup could pull off the order at similar graphics settings and performance.
I think the main question is why is what is an inferior gpu to whats on a ps4, outperforming it so consistently?