Wow, getianshi, congrats!
I visited both places, so here's my 2 cents:
My initial impression of Hopkins was more positive,
only because the admissions office seemed to care more. Both schools have incredible research, clinical training, money for international programs, reputation, residency placements etc. etc. The students at both schools are brilliant, accomplished, and friendly. I would say that your career prospects will be identical at both places (which is to say...phenomenal). As far as I can tell, you only have three things to consider:
1) Money - If one of them gives you a significantly superior financial aid package, I'd say it's a no brainer.
2) Curriculum - I think NP would be quite different from Hopkins in the first two years. Personally, I'm a little nervous about PBL (so I'm not sure if I'll choose Stanford or Harvard NP). Maybe you can get a better idea about PBL on revisit weekend next month. There is also grading to consider (if this is something you care about). Personally, I LOVE real Pass/Fail. Harvard has it, and Hopkins doesn't.
3) Location - Again, this is very much a personal issue. I grew up an hour away from Boston, and I find it to be a decent, but not spectacular, city. Baltimore isn't as nice, but it's definitely better than I expected. What do you like to do for fun? I spend every free moment outside cycling, hiking, skiing, etc., so Harvard's proximity to the White Mountains is hard to beat. Plus, you can go for a jog right from Harvard's campus, which is possible, but not nearly as pleasant, from Hopkins. On the other hand, DC is a short trip from Hopkins, and I really love DC.
I guess it comes down to where you would rather live (unless you have strong feelings one way or the other on PBL). For me, location is hugely important, but for others it's a non-issue. If I get off the Hopkins waitlist, it will be a tough choice (I'd probably go with Harvard just for the mountains and proximity to my family). But, like I said, I might not go to either if Stanford comes through with some financial aid (you can't beat northern CA for outdoor fun). One last thing, I beg you not to make your decision based on the fact that Harvard is "#1" and Hopkins "#2". What the heck's the difference? Good luck, what a tough decision!