Deferred rendering would be faster on PS4 too.
What makes the Esram happy ?
- A lower resolution ? PS4 would be faster at a lower reslution too.
- Less alpha effects ? It's good for the PS4 too.
Etc.
If a specific optimization makes the code faster on PS4, then it should work on XB1 too and vice versa. After all, both consoles are virtually identical.
Basically, this sentence only means that you need to lower the resolution on XB1...
Its not so cut and dry recop.
Yes in theory its true that anything Xbox did would benefit PS4, at least in a general statement this should be true.
But there are some things that would benefit PS4 _more_ than doing it the way that is best for XBO for instance. And I don't think your argument accounts for that.
If everything that was great for XBO was equally as useful for PS4 (and we made PS4 follow the XBO code path), then you'd imagine there would be a lot of cases in which PS4 is not being fully utilized. Which is the worst case scenario for PS4 owners.
When a more powerful machine like, X1X chooses to go 16xAF or 4K assets, that's not good for the base models, they will be impacted heavily by them. Whereas, reducing the assets down to below 4K, or choosing less than 16XAF won't really impact X1X, or improve performance. this is the advantage of having more power (something PS4 shares in common over XBO in this case).
When you have more resources, you can do more, before you reach your limits, and reducing the graphical options will not necessarily make things 'better' than if you loaded them up.