Seems pretty easy to distinguish them myself. Their icons are above the squads, just have to know what the icons mean.
The icons get lost in the mess often. In vanilla COH units are extremely easy to distinguish due to actually LOOKING different. Plus, in COH2 units actually blend in with the freakin background. I get the notion of camouflage, but this is an RTS and unit management, tactical decisions and micro are all dependent on one's ability to assess the enemy's unit composition. But if you can't even tell YOUR OWN units apart, something's really wrong with the RTS.