In the blind test, all images marked with “A” belong to one camera and all images marked with “B” belong to the other camera.
I did my the test myself, and honestly, right at the very first image comparison (see image below) I thought “oh please let “A” be the the Fujifilm GFX100S“. And lucky me, camera “A” is indeed the Fujifilm GFX100S.
Megapixel had not much to do with my preference. It’s a compressed youtube video, how could that matter. Megapixel matter more when you work with the files in post, or when you print.
My preference had more to do with the output of the Fujinon GF80mmF1.7 lens itself, which is very similar in terms of shallow depth of field to the RF 50mm f/1.2 L, but the bokeh looked just more pleasing in my eyes. Then there are other subjective elements like the colors (Provia in this case) and so forth. Overall, I mostly picked A (GFX100S).