Appreciate your reply.
I'll not necessarily be starting business right after school. entrepreneurship (ES) mindset can help in small start-ups (certainly) but even in big companies.
I'm not sure whether too much focus on one thing actually makes babson program too narrow and might fail to give me the broader look necessary to explore multiple areas. sometimes PR for program goes to the point that it looks an oversell because it doesn't get reflected in their recruiting or reputation records (as it is still a tier 2 school like BU compared to tier 1 schools like mit, harvard in the boston area). Still they have a formidable ranking 1 in ES for more than 15 yrs which means something.
on the other hand, bu has more advantage in terms of diversity, reputation and still a more broader program with lots of concentrations to choose from. it is possible that i will find my area-of-real-interest after finishing my core courses and need to have that option of choosing detailed focus area at that time instead of choosing ES and later realizing that is not what i want to pursue.
try to find out what area you feel to be interested in upon graduation (even broad one) and analyze that field in terms of those two schools.
You can try even linkedin.com to see average postgraduate profile.
Anyway, your choice will be the best