Interesting post on torahhalacha.blogspot.com about the modern battle against assimilation with a special reference to R' Hirsch:
"Rav Shimshon Raphael Hirsch took a different tack for his place and time. His approach was to beat the opposition at its own game. Rav Hirsch went out to the assimilated youth to challenge their adherence to the ways of non-Jewish society. Whereas in the past non-observant Jews tried to diminish Torah observance by attempting to poke holes in the logic of Torah observance, Rav Hirsch poked holes in the logic of assimilation. Rav Hirsch armed Jews with rhetorical weapons to fend off the assimilationists. Jews could now venture into fields of employment that brought them into contact with the world at large, without severing their ties to the Torah."
I often mull over the differences and similarities between R' Hirsch and R' Miller, two influences in my life. A paragraph on the Musar movement captures some of the differences:
"Rav Yisrael Salanter had another approach. He taught that one's goal is not to be superior to the next man by diminishing him. One's goal is to be better than oneself. The message of the Mussar movement was self-perfection."
I think that this quote captures another one of the differences which is that German Orthodoxy is more outwardly focused in some respects, more community minded like the Chassidim. Musar is individualistic, which could be dangerous to Americans for even as it tries to fix our decadence it could play into our selfishness.
As we know, R' Salanter and R' Hirsch had great respect for each other so we needn't see the differences as requiring a choice and right verses wrong.