DSKR Check has published a new ISO noise comparison test between Sony NEX-5R, Olympus E-M5, Panasonic G5, Sony RX100. Once again, this comparison proves that the Sony RX100 is the worst (no surprise here, and in fact, RX100 performed very well given its sensor size). Panasonic G5 is the next worst of the group which once again is not a surprise. The real comparison here is between the Sony NEX-5R and Olympus E-M5. You can see them for yourself but I think its pretty close, even at ISO6400.