University of Wisconsin-Madison vs Howard University (WA)

Could someone with knowledge of these schools compare/rank these schools? I saw that Howard got a lower rank on usnews rankings but is the more selective of the two. For someone aspiring for a science degree and maybe even going to a top grad school, which would be a better place to start?
ethnicity: doesn’t matter, but am black
citizenship: international
gender: female
not heavily into partying so that shouldn’t factor much
I like being challenged ( >2000 on SAT; 4.0>/=x>3.0 GPA; straight distinctions in local/regional exams)
would learn to play an instrument
plays soccer

Biology is one of the most popular majors at Howard. The entire "Valley " is dedicated to physics, chemistry and biology.

Howard is in DC which is way more urban and diverse than Madison. Howard is also smaller, having less than 12,000 students whereas UW is huge and has about 40,000 students–not my cup of tea at all but that’s just me personally.