The DxOMark of the K-5IIs has been out.
http://www.dxomark.com/index.php/Publications/DxOMark-Reviews/Pentax-K-5-IIs-maintains-the-excellence-of-its-sister-model-the-K-5-II/Measurement
A quick comparison of the K-5IIs against the K-5II against the K-5 is as follows:-
http://www.dxomark.com/index.php/Cameras/Compare-Camera-Sensors/Compare-cameras-side-by-side/%28appareil1%29/829|0/%28brand%29/Pentax/%28appareil2%29/830|0/%28brand2%29/Pentax/%28appareil3%29/676|0/%28brand3%29/Pentax
Now, we can see a major pitfall of the DxOMark here, that is, it actually never measured any actual resolution of any camera! What they took into account is only the pixel count of the cameras as specified. It is therefore whilst the marks of the cameras under test are all the same, in this case it is the K-5s', but in reality the Image Quality of them may be different! But then what is the meaning of this IQ benchmark then?! :-o