I think that in terms of business edu quality, employment, US BS are generally better. but if you have visa problem or no wish to immigrant, one year program(except for LBS) may save you some money and time.
dodo is right that European school is cheaper and easier for visa. But, it's also tougher to find a good job in Europe. Usually, European company is forced by government to hire people from own country first; then people from EU.
I do think US BS are superier than Europe, but think of rough visa and bad economy of US, at least at this time go to US is not a wise choice unless you are admitted by Top schools!
if u cannot wait for another one year,u should consider EU BSs. one Oxford alumnus told me that most of his chinese classmates now work in EU. while news from other channels said that most chinese students come back to china. quite confusing situation.