I like pure math, so CS x Math obviously appeals more. I have no idea why I put down CS Engineering, but I’m paying for this mistake right now.
Did you put it as your second chance? I think CS+Math is somewhat easier than CS Engineering. CS+X would be even easier though. Here is a link to the transfer GPA’s, which may show the difficulty of admission into the program:
https://admissions.illinois.edu/Apply/Transfer/gpa-guidelines