At northeastern, they have the option of going on co-op or performing research, so there is that option if you are looking into that field. I know a few friends of mine (I got to NU) that were pre-med and after having a co-op in the medical field/hospital setting they decided that it wasn’t for them and switched their focus to research, so the one plus of NU I would say is that the co-op program allows you to really figure out if you want research or pre-med, of course you can always do both! As the others have said, for pre-med it doesn’t really matter what school you go to as it is all dependent on you. All colleges will offer the same basic classes required for medical school, so don’t worry about the classes. I would say look at what major you want and make sure the school offers that major as pre-med is not usually a major. For most science majors, you are required to take classes that fulfill med school requirements, so no matter where you go you will be taking the same classes.
All three schools are large (I toured and applied to all three), though completely different. BU is located in the city right on the green line and is a major research institute, though there is no campus. It is simply buildings located along the Main Street with no campus-y green scenery one might picture college to be.
UMass Amherst on the other hand is not in a city. It is located in a small college town and is so big that it even has its own zip code, or so I’ve heard anyways. The campus is beautiful and it is all green. So if you are looking for a green campus I recommend UMass Amherst. The campus large enough that they offer shuttle buses between dorms/buildings. I will say that it is far out in Western Mass, which means you are basically surrounded by trees. I’m a city person and hated the two/three hour drive from my hometown (10 minutes south of Boston) to Amherst, though if enjoy nature and prefer to be away from the city it is def. a great option.
NU is somewhere in the middle. It is also located in Boston and right on the green line as BU is, but there is a campus feel to it. There are parts that are green and lots of common spaces to play frisbee and lay outside, but it also located in the city. NU offers the best of both worlds if you like both the city and campus-y feel.
I will say the one major difference is the price. UMAss is a great school for pre-med, they even have their own UMASS Amherst med school (so does BU). It doesn’t cost as much as BU/NU (though that was for in-state so I would double check and look at financial aid they each might offer). To me, I think that if one is going to do pre-med and know they will have to go to medical school, which is expensive, I recommend the cheaper school as you take the same classes as an undergrad anyways, though if you don’t like the campus/school that is a different opinion.
Hope I helped & feel free to contact me with further questions!