UIUC vs UW Seattle

One of the best features of UW is the Undergraduate Research Program:

https://www.washington.edu/undergradresearch/

https://www.washington.edu/undergradresearch/students/

https://www.washington.edu/undergradresearch/about/

https://www.washington.edu/undergradresearch/symposium/

A lot of top research in a lot of areas:

http://www.washington.edu/news/2017/04/03/uw-lands-at-no-9-with-45-subjects-ranked-in-the-top-10-in-center-for-world-university-rankings-inaugural-subject-list/

http://247wallst.com/special-report/2017/04/04/universities-investing-the-most-in-research-and-development/4/

http://www.washington.edu/news/2016/09/28/uw-ranked-among-the-top-five-most-innovative-universities-in-the-world-by-reuters/

Also, very few of the 180 majors at UW (some engineering, biochemistry, business administration, and computer science) offer admission to a small number of freshmen. Many students, like OP, are undecided about their majors when they enter college.

https://www.washington.edu/uaa/advising/academic-planning/majors-and-minors/overview/