The similarity between the appearance and the actual parameters of these two machines is above 90%, such as the size of photosensitive original, aperture size, LCD screen size, appearance, etc., but there are slight differences in some aspects. For example, the optical zoom factor of PXW X280 lens is 17 times, and that of PMWX280 is 14 times, so the bigger the light, the better the telephoto. PXW X280 has wireless WIFI function, which can realize wireless interconnection with some apps, but PMW EX280 does not. It can be said that PXW X280 is an upgraded version of PMW EX280, but the upgraded function is not very big. I have used both of these machines, and I feel similar. I hope my answer will help you to some extent.