You have fundamental differences between the shutters. The Krasnogorsk employs a revolving shutter, Beaulieu has one going up and down. Both introduce uneven exposure across the image area, the angled revolving one due to the shutter edges standing farther away from the aperture on one side, the oscillating one due to the asymmetric motion relative to the aperture. Unevenness, however, is in the 2 to 3 percent range for the Krasnogorsk, therefore neglectible, and about the double for the Beaulieu. The Guillotin shutter compensates in general for the light coming from above and the sky mostly up in the frame.
Those zoom lenses I can’t comment on.