Can you prove that?
Yes I could. Maybe one day I do that and take some comparing images. The Sony kit give me a slight warmer tint than the ol’ Canon or a Laowa.
And to the other comments, this is where one problem comes in, I often use manual lenses, so no EXIF data in the image file. I sometimes do add the lens to the EXIF (pain in the *** job, why can’t Darktable do that?).
Further, there is always some afterwork with Darktable (or whatever) and you can change tonality etc anyway.
If any Sony person is interested, here is the topic with the *.dcp files for various Sony cameras. It got updated several times and the latest should be near the bottom.