I’ve noticed that enemy operatives don’t seem to change their clothes when disguised.
At first I thought it was just because I could see through their disguise if they were disguised as me, but then I saw an enemy operative disguise as another guy right in front of me and while he had another team mate’s name on his head, he was again in Security clothes (while I was playing as resistance).
Now, this might still just be because I saw him put on the disguise and the game’s able to know this, but I’m not 100% sure about that.