For example from left to right these 3 fresh units are a Grenadier43, a Wehr Infantry, and a Volksturm, notice their strength plates are all the same '15'.

So correct me if I'm wrong, but must we select a unit then click its 'i' (info tab) to see its actual combat strength?
Doing that with those units reveals that the Grenadiers combat strengths are- Soft attack 13, Hard attack 13, Ground defence 11.
and the Wehr Inf is 11- 7- 8
and the Volksturm is 6-11-6
In other words the Gren is the most powerful, then the Wehr inf, then the weak Volksturm.
It's easy enough to memorise those three, but there might well be a dozen more friendly units in play, plus loads more enemy units and it's impossible to memorise them all, so I'm just wondering how you guys know which your best and worst units are in order to deploy them accordingly, and which the enemy's best and worst are too, do you click 'i' for every unit?