In practical application both my experience as a multi-format shooter and this test indicate that no matter what you calculated, the reality doesn't fit your interpretation. At similar apertures and similar FoV's larger formats have far less apparent DoF. What I think is overlooked is that while DoF is a constant relationship to aperture and focal length, in application across formats, FoV for film size for a given focal length isn't, and so apparent DoF for the same FoV isn't either.
When I put up the Turner Reich Triple at 25 inches, at a portrait distance, I'm lucky to get more than an eye without stopping down.
Don't make me make these negatives.