While the above is true, it is nice having less distraction.

If true that your pass rate is slightly higher, then your statement above might account for some of the reason.
😀
On a slightly more serious note, I don't see how anyone can choose for you OP. Both are good schools and do a great job preparing their students for residency.
KCUMB's curriculum is basically system-based. You have one introduction section meant to fill in the blanks and to get everyone on the same page, then the rest are done by organ-system. There are plusses and minuses to this sort of curriculum. I feel that this approach has a strong clinical orientation and helps you organize your basic science in the way you'll basically be using it clinically, during rotations and beyond. One down side, however, is that you tend to cover basic science topics out of order and it can be hard to draw a complete and coherent picture of what's going on; in other words, it isn't as well integrated as maybe a traditional course would be, so you sometimes don't get how things fit together until the very end. Indeed, some things might even get lost in the mix, while you might hear one type of topic, say, rheumatoid arthritis, lots of times. I'm studying for boards now and it's just amazing how things are now finally coming together and making sense. Also, of note is that quite a few schools have now copied KCUMB's curriculum, for what it's worth.
I don't know how KCOM's curriculum is set up, so I can't comment. I'm sure it's good. I've heard nothing but good things about our sister school up north.
I don't know, OP. Take some time to feel out how the school environment works for you. It's a bit hard to gauge just from the interview day, because schools are trying to market to you. Maybe go visit both again, try them on for size, and see which just feels better to you. See which one you feel more welcome at. Also, take a look at the rotation site list and see which school has the sites you might like to choose from. Lastly, you cannot neglect location. From what I gather, there isn't much to do in Kirksville, which as mentioned above, can be a good thing. There's much more to in the KC area. You need to figure out which will work better for you.
One final note: KCUMB has the Score 1 for Health program, where you go out during your first and second years and do health screening on elementary school kids in the metro area. This is pretty unique and I know that I've learned a whole heck of a lot from these events. Timing of these events can be a bit annoying at times, especially when you trying to prepare for exams, but overall, it has been a very valuable experience. I've done quite a few well-patient physical exams on kids now and I bet this will come in handy when I start rotations.