That claim doesn't make sense. Their sensors are just sony sensors with a different bayer pattern. The only way that puts them behind is somewhat inferior support for their bayer pattern in RAW editing software.

In any case, you're almost always capturing video in pre-processed 422, at which point the image processor has already debayered the image.

Fuji is fine. But there's better IS, tracking, better AF, thermals, power, noise, audio in other cameras. I never really felt like X-Trans had much to do with it, once they got proper streaming.

As soon as they started doing full sensor readout they became competent.