Yes the first ones are MGM and second ones Mondo (filenames have mgm and mondo in them as well).
I’m not sure what you mean by the weird look/photoshopping… or do you mean the grain (at least photoshop actually does have grain filters)?
In my opinion the images from the Mondo disc look like film (lots of film grain is visible on those screencaps… it will look better in motion though) and more detailed (look at the “jacket” of the guy who is second closest to the camera on the second pic) while the MGM disc has been filtered to loose the film grain and looks smeared.
This is from a completely different film (no shit…) but does this look photoshopped to you as well?
Just trying to figure out what you mean by the weirdness.
This image is from the Criterion Blu-Ray of the Seventh Seal and I think this is probably the closest it will resemble the original film until a better format than Blu-Ray comes along.