Radeon Pro 560/570 4GB performance?

[padams35]

I do casual gaming and don't anticipate needing the Pro 580 power any time soon. However I am curious how the Pro 560 @ 1080p compares to the Pro 570 @ 1440p.

Have any of the mid-tier 2017 iMac purchasers run benchmarks or have reviews they can post?

 

[Quash]

The 560 has half the tflops and less than 40% of the memory bandwidth.
My money is on the 570 even if it has to push 1440p.