If you know the location of a bot through any reason (sensor (detail 3+), trojan, farcom, and maybe triangulator), moving the cursor onto that bot gives you it's class rating, unless you don't "know" the tile they're standing on. Clicking "label hostiles" just gives you the robot's class general class, which is still better than nothing, since i don't know how i would otherwise sometime have a hard time telling friend from foes in caves with sensor detail 2.