Ok I have some insight for you about Western. I interviewed there and was accepted there this year. I think if you are chosing Western or SGU based on their tier level, then you need to consider other things about Western as well.
Western is not your typical veterinary school. It is COMPLETELY problems based learning oriented (PBL). Which means there are no lectures. You work in groups of 8-10 for a few weeks at a time, on a case, with a mentor, and then you switch to another group. You are basically working to solve these clinical cases as a group by an approach called problem-oriented approach to veterinary medicine. It is structured and we did a practice one at our interview. It was neat to see how it works, and it actually does work. Then you have a normal written test on different subjects just like any other vet school has.
A lot of people have trouble with this PBL approach to learning and it is definitely not for everyone! If you can't stand working in groups and with other people and most importantly, TEACHING YOURSELF all/most of the time, then I would not consider Western.
However, they are a private university so they don't discriminate in/out of state and everyone is equal in that sense. And they do stress diversity, which is why their stats seem lower. But the quality of veterinarians who graduate from Western are still of high magnitude. Basically, to give you an idea of how far they stretch this whole diversity thing...if you are put on the wait list...you only get off if someone of a certain diversity that you match drops their spot and you are next. So it's not necessarily ranked either.
So those are some things to think about with Western as well. From personal experience, I would apply to as many schools as you possibly can. You never know unless you try, right?