This is the "base" uniforms set. We all know these.
From the top left, going right and down:
Prisoners- min sec, med sec, max sec, super max, protective. I added another med sec by mistake.
Staff and emergency (marked with E) - worker, guard, riot(E), armed, elite ops(E), doctor, orderly, medic(E), cook, gardener, janitor, fireman(E), dog handler and dog, teacher, soldier(E), truck driver, sniper, chief, foreman, psychologist, psychiatrist, accountant, lawyer.



Only when I almost finished writing this "guide", I noticed I've missed the farmer in all of them. So I took them alone, as taking new screenshots is too much work. The game is weird in how it reacts to the print screen command, so taking screen shots is annoying and I'm lazy.
This is the classic farmer.

The Desert set change only the prisoner's and hired security staff's uniforms, as far as I noticed.
The variants of sprites for some staff changed and might make it look like a different uniform, but it isn't. The positions of the sprites are the same as in classic, so one can compare.
The different uniforms I saw change are:
Prisoners - same as classic, but with stripes.
Staff - Guard and chief. That's it. the rest are the same.



This is the desert farmer, same as the classic. I even used the same pic from the classic to not upload two of the same pics.

The Undead set, AKA zombie set, in my opinion, is the worst. it's the classic set with some blood stains on some of the hired staff. It just makes them look dirty. Very disappointing for me.
The staff the got "zombied" are - worker, guard, armed guard, doctor, orderly, cook, gardener, dog handler (the dog was spared), teacher, sniper, chief, foreman, psychologist, accountant, lawyer.



The undead farmer, like the rest of staff, is the same as classic just with some blood and dirt stains. I though it might be missing one nub on the overalls, but zooming in, you can see it's there with dirt hiding it.

I mostly used this set since it came out.
This set made a difference for me and showed real effort in making the uniforms look different.
the changes are as follows:
Prisoners - They have some thin vertical line on the center of the body of a lighter shade, and wide horizontal lines on the bottom and top of the overalls of a darker shade. seen better on the med and max prisoners in the pic, as the head doesn't hide it like on the narrow body.
Staff - almost all hired staff had the uniforms change. worker, guard, armed, doctor, orderly, cook, gardener, janitor, dog handler (the dogs have the robot dog that goes with this set, but it's a choice), teacher, sniper, chief, foreman, psychologist, accountant, lawyer.



The futuristic farmer gets new uniforms as well.

The last set, at least for now, is the Jungle.
This set, like the futuristic, makes many changes to the staff, but this time the prisoners seem to get just a touch over the classic.
Prisoners - The uniforms are the classic, but with a wet\dirty look on the bottom.
Staff - Like the Futuristic, most staff had changed. worker, guard, armed, doctor, orderly, cook, gardener, janitor, dog handler, teacher, sniper, chief, foreman, psychologist, accountant, lawyer.
i'm into this set at the moment because of the bright colors of the workers, and the old explorer look of the whole set.



And the farmer looks, to me, like old pirate crew member.