Hello aspirant!!

First of all any of the colleges listed above do not impart good Computer Science Education . But considering that we need to decide on only these options i would suggest you to go for VIT . Reasons are :-

Location : Students dream about College days. They want to make friends , roam around , go to parties and do every bit they could not afford while they were in school . VIT is very remotely located , even to reach the nearest developed City i.e. Chennai takes around 2.5 hours. So the student would actually have less escape-ways and even if he decides to get away he wont make much of those trips. On the other hand SRM is in Chennai and people have access to all kinds of clubs and pubs whereas MIT has a perfect beach nearby so basically less distraction at VIT.

Distraction : Though nobody can guarantee that a student graduating from VIT would do wonders and the students from the other two wont but the availability of things makes the matter worse. While there are plenty of stuffs like weed,coke and others are freely available near SRM and MIT , in VIT though the availability is bit less and thus people don't fall in the trap easily.

Education : Basically all 3 of them impart similar kind of education but VIT is still better than both of them in Computer Science Education and many companies recruit far more number of Students at VIT then from the other two. Over that there is a special entrepreneurial community and Robotics lab for the interested students . Flipkart , Amazon and even Google recruits frequently , so your brother might have a chance.

Opportunities : Lastly i would like to add VIT has bundle of opportunities to grasp . It has a great incoming cohort as studious people prefer VIT over others . It also has two sets of timings and plenty of subjects to choose from for your major and it would really add a value to his or her CV .

Before cutting it out i would just like to remind you that these colleges are somewhat of same stature and it doesn't really matters a lot as to which one you opt for but the deal really depends on how the students want to shape up their four years and future carriers . Believe me, a person does better if he really knows and is clear about what he wants to achieve in life . These colleges are just important milestones of their journey.

Hope this was helpful.

All the best.