I am a fan of UIUC and know GA Tech to a lesser degree but they are both known as top notch peer CS programs. For me, it will come down to:
- Cost - $52k GA vs. $56k-66k UIUC
- Location - vibrant urban location vs. flat middle of nowhere mid-western city
- Weather - Generall warmer south vs. cold Illinois winters
- Course credits - compare how many pre-requisites you can get waived. Both schools have a ton of upper division courses but you will need room in your schedule to take them so skipping a bunch of lower div/univ requirements can be a meaningful differentiator