The above may not be 100% correct though. The Full SNR curves at DxO are pixel level curves (aka "screen") and have not been normalized to 8MP. So if I'm not mistaken, the DxO figure of 11.0 stops would compare to Guillermo's figure of 11.2 stops which still is a nice match.
I didn't explain well. My 11.2EV
figure is DR after normalising to 5D resolution (i.e. 13Mpx), so can't be compared to any DxO figure.
based DR figure, obtained from these per-pixel
Is a DR of 10.8EV
for the Pentax, 0.2EV below the calculation from DxO curves which I found to be 11.0EV