The euro look as you say is more just a formal casual look. I have noticed that they wear leather shoes more often then not and dark clothing, ie dress slacks and button up shirts. The jeans are pretty much the same though saw many women with half tops/hip huggers the same aeropos look as here.
Americans in general dress pretty low on the formal meter, I did not see any people walking around in europe with those stupid T-shirts with the wolf howling at the moon or the best is the flamingo with the words Orlando printed on it... YES!!!!
I wear chinos and never once saw them there so I would have to say we look different. Neither is bad or good but one looks different from the other.