the Samsung comes with a 2 year warranty , it has a easier menus, less keys to press, it shows the exposure setting on the lcd in live view, and with memory prices getting low and lower the difference between DNG and PEF will be no consequence soon!
The K20D is supposed to have Enhanced Dynamic Range , but it has been shown to cause more noise in dark areas on images
You could probably flash a GX20 to a K20D and visa versa, the cameras are functional identical it`s just a few Pentax features are not enabled on the GX20.
Originally Posted by Canada_Rockies
There is one difference between the GX-20 and K20 - The GX 20 only saves as DNG or JPG - it does not use PEF at all. The other differences are cosmetic differences such as the button shapes. The only down side to no PEF is the file sizes that are saved. So buy a 6Gb card instead of a 4 Gb, and the operation is the same
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