And yes, I know that Fuji has done something to customize the microlenses for the Sony sensor. I have no idea as to what the real world, practical effect of this customization is on image quality. I surely wouldn't trust Fuji marketing materials for the answer. I suspect nobody here really has the sensor design expertise to KNOW the answer. Moreover, the ultimate image quality out of the GFX is the product of a multitude of factors in the whole image processing pipeline, from the sensor, to the lenses, to the raw processor, to the profiles, etc. How one would isolate the special microlenses, I have no idea.