I would expect that both schools would do a fine job of providing a general undergraduate physics education. However, Lehigh would offer more opportunities to discover and explore specialized branches of physics, which could be a plus if you were planning to eventually study physics at the graduate level. For example, if you did become interested in astrophysics specifically, it looks like BC offers only a single course in this field, while Lehigh offers a full astrophysics major (as well as an astronomy major).
http://www.bc.edu/schools/cas/physics/courses.html
http://catalog.lehigh.edu/coursesprogramsandcurricula/artsandsciences/astronomyandastrophysics/#undergraduatetext
The flip side, as noted before, is that BC would likely be better for exploring the humanities, including music and languages. Lehigh certainly has music and language programs, and they are probably good; however, they will probably not be as extensive as those at BC, given Lehigh’s smaller overall size and greater STEM orientation. And the general arts/music/culture scene is obviously bigger in Boston than in the Lehigh Valley.