I took two RAW files from imaging-resource.com . One was from ir's review on the E-M5, the other was from ir's preview of the GH3. Both were taken with identical settings. I then converted both images to DNG files in Adobe DNG Converter 7.3 and opened them in RawTherapee 188.8.131.52, where I set the Postprocessing Profiles of both to 'neutral-UnchangedTransforms' and the Color Management Input Profile of both to 'none'. I changed these settings in order to have as neutral a view of the two files as possible, telling RawTherapee to ignore camera-specific instructions for processing both images. I then adjusted Exposure Compensation on the E-M5 file by plus 0.58 EV, in order to compensate for the difference in brightness between the images caused by resetting the first two settings. I've uploaded both images here - can you tell which is which?