Originally posted by ogl I'm 100% sure that it is the same.
I just did some side by side comparison (JPG, DNG, ISO100 to 25600, manual focusing, manual exposure to keep the same Av/Tv settings, fixed dark indoor light around mid night ...), I have to say the two cameras perform quite similar. But photos from K-01 are about 1/3 to 1/2 stop darker than those from K5 (same settings). Noise levels are about the same too, but white balances are a little bit different between these two. Ended up the results from K-5 look a bit pleasing especially at higher ISO.
In my side by side testing, the results from K-01 seem a bit sharper w/ more details. JPG files from K-01 are 1-2Mb smaller than those from K-5, but they seem to be sharper w/ more details than those from K-5. There might be some focusing error here, so
the results are not conclusive w/ just one single test. I used manual focus, live view on both cameras, Focus Peaking does help a lot in manual focusing. I wish Pentax could add this in K-5 by firmware upgrading).
I'll try to upload those original files somewhere on the web so you guys can take a look. Again, there might be some focusing error w/ K-5, so the pictures look a little bit not as sharp as those from K-01.