Well the results are out, pretty fast I must say. DXO just released a comparison between the GR and the Coolpix A and my hunch was proved to be correct. The GR is sharper across the frame with slightly lower ISO than the Nikon.
In fact, the difference of 2 DxOMark points is not discernible in final images so these two can be said to have essentially the same image quality.
So here’s my visual response to the DXO report.
How do you like them apples ― Booyah