At f4.0 aperture vignetting disappears, and the difference between the lenses gone.
Even such simple things as weight, not to mention the resolution remain uncertain.
Recently I've got to my hands an interesting lens: Helios 44-3 58mm f2.0 MC.
An interesting fact that lens was made on the territory of Belarus.
These images show a slightly "ghost" circles that degenerate into an oval at the edge of the frame.
Previous images show that both lenses have the same torsion background typical for all Helios models.