Was there any difference in their uniforms?
It depends on the artist.
The McMahon Cursed Earth versions looked pretty much the same, but appear to be a lighter colour.
Colin MacNeil gave them a slightly more streamlined Eagle pad, with double zips in Song of the Surfer.
If it's just after Judgement Day, a crispy look will do.
The IDW strip has a white uniform.
They've not really appeared enough in the prog for a definitive version.
If memory serves, I think it was a Hershy story, their boots were knee length. Z
(http://blurppy.files.wordpress.com/2013/12/judgedredd_mc202_cvra.jpg)
The white uniform on the left is from the IDW series, matched with the white helmet.
Although it should also be noted that the Kennedy on the badge is the Chief Judge.
True, but in the flashbacks it's the same uniform (apart from a star where the bear is)
I'm not sure if the other flashbacks when he's in his lycra rad-budgie smugglers are canon...
The other thing that isn't apparent in the paperdoll version is that the yellow/gold around the helmet visor turns into stylised eagle wings at the side. It's a great piece of design, and I want to convert one of my Mongoose judges ASAP.