What are the chances of getting a better college in round 2 of UPSEE 2018 as compared to the allotted college in round 1?

The chances depends upon the availability of seats according to my personal experience I attended the counseling till round 3 and my college didn't upgraded in any of the round most of the time the seat is upgraded in 4th or 5th round because it happened with most of my friends so if you're planning to wait that long I would suggest you to keep a backup with you.