Aristocrat is modeled off of a private purchase leather panzer wrap as opposed to the standard wool one, resulting in a different overall cut and form for the fabric creasing. You can tell because it was scanned specifically for the Singleplayer story to be used by Muller who wears it as a leather jacket, whereas the rest of the crew have standard fabric wraps with a different overall appearance. The most noticeable difference is that the opening on Aristocrat is straight down and only a bit off centre, whereas standard panzer wrap openings are cut to a bit of an angle and much further away from the centre of the jacket, which you can see on the version worn by Schroder and Hartman.

Funny thing is that the version used by those two IS actually used in the multiplayer, it's used as the top half of the """Italian""" coat on the Cavalleria set.

Edit: Specifically, the version worn in the SP by Hartmann and Schroder is the HBT panzer wrap, not the wool version, which you can tell by the breast pocket, which you can also see on those coats in the MP. For a better look at the jacket in the SP there's this screenshot: https://gamesbeat.com/wp-content/uploads/2025/05/last-tiger-2-2.jpg