Chipworks dissembled the E-M1II and analyzed the sensor. And they confirm the Olympus camera uses the “Sony IMX270” sensor. I would be interested to know if the GH5 uses the exact same sensor or a slightly modified version…
E-M1II at BHphoto, Amazon, GetOlympus and Adorama. In EU at ParkCameras. WexUK. Digitech.ch.