I'm a student at OHSU, and I absolutely love it here. With that said, I'll try to be unbiased.
I don't know if this'll work for everyone, but this is what worked for me: I listed the positive attributes about a school that were actually important to me. (E.g. I'm interested in primary care. Therefore, a national ranking of 35 or so, which is largely reflective of how much NIH funding an institution gets, is less important to me than a primary care ranking of #2 in the country. With Vermont at #60 and #5, respectively, they'd be pretty equal for me on the primary care scale, but OHSU would win out on the research end.) Then I ranked each attribute relative to how important it was to me. (1,2 or 3) Then I assigned points to the schools accordingly, and added them up.
It is certainly a limited, an overly quantitative way of figuring out where I'm going to spend four years of my life and jump-start my career, but it's worked now for both my master's and medical school programs, and helped me see which school was really right for me once I factored out all the stuff that people talked about but that didn't make a difference to me.
With regards to tuition, OHSU is hands-down going to be more expensive. But, as a physician, provided you're practicing in a non-third-world country, you'll still be in the top 5% of wage-earners in the United States no matter what field you go into. (In Oregon, that seems to include rural family practitioners.)
Regarding board scores, it's true, as posted, that it depends on the student. It also depends on the class. Each class has their own personality. For example, last year's second-years at OHSU were super laid back--they tended to have hobbies and outside interests, and not be very competitive. The class before them were much more of a gunner class, so I'd imagine their board scores were significantly higher.
Anyhow, best of luck making a tough choice between two wonderful institutions!