Having friends studying in both colleges makes me able to answer your question. Both colleges have convincing reasons and have been in existence for the longest time. 

Christ University offers excellent engineering programs and a highly qualified faculty. They also have an excellent campus. However, based on their online reputation, students are dissatisfied with the programs. 

Presidency University, Bangalore, has an advantage in this regard. The former students have nothing but positive things to say about the faculty. They are cooperative and helpful. The curriculum is always completed on time, giving students enough time to prepare for exams and assignments. It also has some of the best classrooms in the country, all of which are equipped with digital technology for enhanced learning. 

Hence, Presidency University is superior to Christ University Faculty of Engineering for B.Tech.