Both the Panasonic G9 and the Olympus E-M1 Mark III are excellent micro four thirds mirrorless cameras on the market. The Olympus EM1 Mark III may be the new kid on the block, but the Panasonic G9 is rocking an impressive mid-life firmware upgrade. But which one is the king of the Micro Four Thirds world! DPReview has compared the Panasonic G9 with the new Olympus E-M1 Mark III. Watch the video for a blow-by-blow comparison.