Well, of course there will be similarties between soldiers in a unit, it's still a game. The soldiers on the image are small and the ones without shirts seem to stand out more. But I also see that the units are mostly spearmen, so you'd see more homogeneity when units mix. That they wear similar pants is because of a) CA uses colour schemes for factions and b) what else would they wear than trousers?
That is correct.