So there are some that think/assume that the XB1 with a 1.75Ghz CPU would outperform the PS4 with its 1.6Ghz CPU? Even worse to the degree of which we have seen in ACU?
Thats just not the case. There are devs that has specifically pointed out that the PS4 CPU and more importantly its programming language is considerably more effective (thus faster) than with the XB1. Like take this quote for instance.
Metro Redux Chief Technical Officer.
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Oles Shishkovstov: Let's put it that way - we have seen scenarios where a single CPU core was fully loaded just by issuing draw-calls on Xbox One (and that's surely on the 'mono' driver with several fast-path calls utilised). Then, the same scenario on PS4, it was actually difficult to find those draw-calls in the profile graphs, because they are using almost no time and are barely visible as a result.
In general - I don't really get why they choose DX11 as a starting point for the console. It's a console! Why care about some legacy stuff at all? On PS4, most GPU commands are just a few DWORDs written into the command buffer, let's say just a few CPU clock cycles. On Xbox One it easily could be one million times slower because of all the bookkeeping the API does.
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ACU on every single platform is just an all round unoptimized mess. And a game that the majority of its work was done on the XB1 and ported over to other platforms. Nothing more nothing less. No conspiracy, nothing special. This should have been clear the second ubisoft started talking about parity. Even at that time I had been repeatedly saying that the game was just built for/on the XB1 first and is being hurriedly ported over to other platforms. And how I wouldn't be surprised if the PS4 version actually ran worse. And here we are.