Something that is new in 1.2 is the introduction of class icons! These are icons on top of yourself and other player’s head that will tell you what class/advanced class they are. This was done for the ease of identification of player classes since in 1.2 many players will be wearing orange custom armors due the ability to completely remove mods from endgame gears!
The 4 basic classes from each faction have grey icons; the advanced classes have colored icons, a different color for each class. The color match on both factions.
Here is a list of all the class icons I compiled! Study them! (click on the image to enlarge)