The difference comes from the repressing by Pioneer, who also did the CLV. That exact framing difference shown above with the markers is the difference between 3M and Pioneer CAV sets. The 3M is much noisier, but isn't rotted. (haven't gone through it 100% for sure. Also, the 3M is hinged and the Pioneer regular slip box.)

Checked against the MGM first WS CLV, reputedly the first from 65mm elements. Slightly different color tones, but overall actually similar. The above shot on the MGM has both sides intact. Top and bottom are the same on all three.

Thus The 3M CAV cropped a bit from the right, the Pioneer reissue/CLV shifted the frame to the right, and the MGM CLV has the frame totally intact.

The remastered snapper WB DVD from 2001 seems to have the sides somewhere between the Criterions.

I'll give these a spin later and compare audio. Anyone have any suggestions for what scenes would be best, or those with directional dialogue?