After I posted the medium format scans above I realized that I also had a 35mm picture of approximately the same view.
And here is a closer look at the same negative.
It is not a true one to one comparison. Besides the different negative size there are different lighting conditions, different effective focal length, different film stock (but with the same developer) and a different scanning technique (a single X-T20 shot for the 35mm negative). But I think the difference here between medium format and 35mm is clear.
The medium format picture was taken with FP4 Plus film and developed with Rodinal (1+50). The 35mm picture was taken with Tri-X film and also developed with Rodinal (1+50). It is no surprise that the faster film and smaller negative size produced much more noticeable grain. But it is also no surprise to me that the stronger grain combined with the high acutance (edge contrast) of the Rodinal developer can produce more apparent sharpness.
More to think about.