Which would be a better program for getting into medical school. Is one program tougher than the other as far as maintaining GPA, research opportunities etc.
It doesn’t matter. Where you have the best chances of getting into medical school depends on your residency status for instate schools (public of course and even private schools getting any state aid usually need to admit more instate students). You will do best at the school and in the major that best fits you- ie one that most interests you. Also since your chances of being admitted to any medical school are less than 50% you need to think about what you will do with your major other than being a physician.
UW students don’t usually major in the broad field of biology. They choose among many biology related fields such as botany, zoology, molecular biology and several other options. Medical students will have majored in the subject they choose, including STEM fields and any other nonscience major.
Your first job is to look at your choices (by now likely those you applied to and have been accepted at). Consider the campus, costs and other factors. College is not the means to an end, it is a life experience. Where do you most see yourself for four years?
Next look at possible majors that interest you at each school. Look at what is required and offered in the fields. Do you see yourself enjoying the courses you need to take for any majors? If not, you will be changing your major. You are going to college for an education- be sure to include courses that enrich you and that you can’t take beyond college because you won’t have time for them. I’m a physician who eons ago chose medicine over grad school when I majored in chemistry. I am so glad I took art history and music symphony classes as well as that P/F science fiction/fantasy lit course (still offered today at UW). A math major who then went to medical school I knew finished in 3 years- we chemistry majors said she had it easier because she didn’t need the many chemistry time consuming labs we did (but it helps she had the aptitude for higher math). Oh, and it was a lot tougher to be women in medicine in my day- far fewer of us got in. But the same ideas apply to both genders.
Finances trump all if you intend to be spending money on a professional school after college. Not worth going into debt for an undergrad education at similar schools.
There is no one academic path to medical school. It requires using more electives to meet science requirements for a non STEM major but you will be a more interesting person for that. The best program is the one that most satisfies your intellectual curiosity. Now is the time to indulge in various fields you won’t have time for later.
Pick your affordable school based on the environment you will be in for four years. This includes academics and social factors. Pick the major that most interests you. Your grades will be best when you like what you are doing and happy where you are.
Addenda- your post asks us to evaluate 3 different schools. Do your own homework.