Århus is exactly the same, just much much dressier... I thought people in CPH looked quite relaxed and not over-dressed like some girls in Århus tend to be And I think the girls in Århus look more alike. You almost can't tell them apart because all of them basically wear the same outfit. I like that there is a bit more individuality going on in CPH.
There are some individual dressing people in Copenhagen, but there is still a very big crowd of people who look exactly the way I described.