@madison85 wait, I missed that the OP has that award? That is a no-brainer, in my mind.
Oberlin is a wonderful school with a very distinct flavor of student and atmosphere. I know Oberlin fairly well because both of my kids have visited it several times, have sat in on classes, met with profs etc.
However, for someone interested in international affairs, UW wins hands down. Poli Sci is ranked in the top 15 departments in the US.; the visiting speakers, the study abroad, the funding for students for summer research etc., are all phenomenal. Throw in the range of foreign languages taught live, through the intermediate/advanced level, and its a superb opportunity for someone interested in IR.
I’m not sure what monydad’s comments about class size etc contribute to the conversation, since that poster is not familiar with UW registration, courses, structure. Looking on the UW course list, there are 4 separate Micro lecture classes, each holding up to 335 students; each lecture has its own discussions sections of not more than 24 students. Those discussion sections are taught by Ph.D. candidates in Econ at UW – which is also a top 15 ranked department. Some of those are FIG sections, some are offered as part of the learning communities etc. Any Honors discussion sections would be led by the professor who conducts the lectures, as that is what defines an Honors only section of a lecture course. There seems to be a different course which is accelerated Micro/Macro combined which is Honors only.
More of interest to the OP, Intro to International Relations, has a maximum of 240 students, with discussion sections of 17 students. My kid took that class, and loved the prof and his TA. Beyond intro level Poli Sci classes, the classes get smaller, quickly. My kid still has some lecture classes in his major but will typically take the Honors discussion section to have section with the prof. Other classes in his major run between 20-40 students generally, and those may or may not have discussion sections; he has had classes as small as about 16 students in writing intensive classes in his major. The breadth of offerings in International Relations is extensive, my own kid has taken classes in nuclear proliferation, genocide, etc. The faculty are superb. My own kid has developed close relationships with faculty easily, and they have written recs for him, leading to summer incredible internships in his field.
IF – and this is what I said to the OP – IF this is a student who is comfortable with big and does not feel like they would be contorting themselves to survive in a university setting and could only function in a LAC setting, then UW is a clear choice to my mind. If, on the other hand, someone knows they could not do large lectures – and my younger son is one of these, he has said even the intro lectures at LACs which can hold 50-60 kids are too much for him – then that student should not choose UW.