As of the university records it says all campuses are equal. But then I’ve heard from people who shifted from Bangalore to Visakhapatnam campus because of lack infrastructure and other facilities. Faculty remains the same but then they try to put the best faculty in the main campus, but still you can expect highly qualified faculty members there too but then their experience and skills may not be that good.
I would recommend you Visakhapatnam campus over Bangalore campus for CS. But if you think you can cope up and study by yourself then go for Bangalore campus.
GITAM offering good Placement and having lot of exposure with good infrastructure.The average salary is 6 lakhs per annum.So you can better join in GITAM college.
Hope this helps!!