UWC or SAIS? Which would you choose and why?

Actually it doesn't matter so much because usually it doesn't play such an important role, if you will read here https://samplius.com/free-essay-examples/why-college-isnt-necessary-to-be-successful/ about why college is not necessary to be successful - you will understand that it makes a lot of sense, moreover, I know a lot of successful people who have managed to get there without finishing college, but yes, it is a means by which you can jumpstart your way to success, but the simple idea is that you have to do what you like and don't listen to others, because only you are the one who can change your life. I am sure you will succeed!