Tom - I don't know if this answers your question or not, but this weekend I took a bunch of shots that are more or less comparison shots with the K10 and the K100. The firstcouple are direct comparisons, where I took the pictures with the same lens (the Phoenix), while the later ones were taken with either the kit lens or the DA 50-200, some taken with both lenses (and one or two taken with the A300). I was actually trying to chase the low clouds/fog but it was always where I wasn't. Because of that, there was quite a bit of dynamic range to the shots (early morning, some shot toward the sun).
The pictures are full frame, shot in raw and converted in LR without any adjustments, then resized in CS2 (I did use bicubic sharper on all of them - I always do). They were all resized to 1024 wide (wanted to include more detail), so I'm not going to post them here. They are at: http://s28.photobucket.com/albums/c2...l/Comparisons/
and I thought they looked pretty similar when it came to exposure (thought both were slightly underexposed).Not sure they are terribly useful - ifothers think they are boring, and uninformative, please say so and I'll save myself the bandwidth on Photobucket. The last few shots are old - I took them when I first got the K10.
The one thing I did that doesn't directly correlate is that I used P mode and let the camera figure out the exposure. In several cases the aperture/shutter speed vs. ISO selection doesn't make sense to me (Photobucket lets you look at the exif data - I started to put it on the pictures themselves, but I didn't want to spend the time) when you compare what the cameras chose.