Among GITAM and Vignan, the former is a better option. GITAM is far better than any private college in Andhra Pradesh. The course fee is high but the quality of education and the culture on campus make up for it. Along with theoretical knowledge, you will get to learn the practical aspects of each subject. 

The placement record for the institute is great. In 2021, the highest CTC offered in the placement drive was 19 LPA. 

If you are interested in CSE and have a flair for coding then GITAM will be the better option.