If you have a keen interest in biotechnology, then B.Tech in Biotechnology is an excellent field. But if you aren’t interested in the branch it will be better to go for other branches. I have friends from both institutes. Here are some of the facts about the Biotech course at both institutes based on the interactions I had with them. 

Comparison:

• Biotech from UIET Chandigarh is decent, but the placement opportunities are limited. But if you have a good academic record then you can go for higher studies at Panjab University which has a good industry interface with Sun Pharma. 
• Panjab University holds a better international reputation than Thapar University. It will help you sail through the admission process in a leading foreign institute for further education in biotech.
• The crowd in UIET Chandigarh is better than Thapar University. The reason is, UIET requires to require a less JEE Mains cut-off rank as compared to Thapar.
• Thapar is a private university. So, it has the edge over the placements compared to UIET Chandigarh. Being a private institution it charges a massive fee as compared to UIET Chandigarh.
• Thapar has a tie-up Trinity College, Dublin, so you get an opportunity to do (2+2), i.e., two years at Thapar and two years at Trinity. This program can hike the fee up to INR 40-45 Lakhs.

Before joining, it will be better to have a conversation with the students on campus to have a wholesome knowledge about the institutes.

I am assuming that you wish to change your branch to CSE as it is one of the most sought after branches at Thapar University. Mostly all the seats for CSE get filled up during the counseling, but 2 or 3 seats may remain vacant. Here are the two ways of changing your branch in Thapar University -

1. December Test- During the month of December, usually towards the end, Thapar University conducts a test to fill the vacant seats in every branch. This test offers a branch change from the 2nd semester onwards. This exam is also open to students who have completed their 1st semester in another college. The paper pattern is similar to JEE Mains but it is way easier. However, the competition is high because many candidates take this exam. For CSE, you will need a single digit rank. Some seats are reserved for the children of faculty. 
2. Year end change- For this, get an 8.5+ CGPA in your first year. Doing so is neither difficult nor easy. The subjects in the first year are easier. Try to score maximum marks in the practicals and work hard for the mid sessionals. There are few chapters in mid sessionals and scoring is easier. For the end sems, chapters are way more in number and the weightage is around 45-55%. Therefore, pay good attention to other exams as well. For CSE, the CGPA requirement soars higher than an 8.5 because of high competition. In fact, it goes to 9.2+. You will have to work very hard.

These are the two ways to get your branch changed at Thapar University. Both require hard work and dedication, especially if you wish to get into CSE.

To get a 9.6+ CGPA in your first year at Thapar University, follow these tips with diligence-

1. Learn about CLO’s - Course Learning Objectives for each subject.
2. Sit in the front rows and listen to the lectures attentively.
3. Pay ample attention to the theoretical part of your course.
4. Solve all the tutorial sheets on your own. Seeking help is acceptable but do not copy.
5. Go through the previous year question papers and solve those questions.
6. Set a target for 75% in each exam. This will help you achieve your goal.
7. Always sleep well the night before the exam. Do not forget to take your calculator, Id card and stationery to the exam hall. 

I would also like to break down the entire marking scheme for you. At Thapar University, there are around 47 credit points for all the subjects of 1st year. Therefore, you must secure 452 credit points by the end of your first year (47*9.6). Make sure to not get below A- in any subject. 

As far as A grades are concerned, you will get an A grade for 29/47+ credit points. Credit per subject ranges from 2.5 to 5, mark the top 7 subjects in which your aggregate credits will make up more than 29. Approach your teachers and ask them how many marks would you need to score an A in their subject. If they do not give you a clear answer, ask them about the situation in the previous year. This way you will get a better picture of how much you need to score.

Getting a 9.5+ CGPA in your first year at Thapar is a bit difficult but not impossible. For this, you will have to stay in the list of top 90-100 students in your batch.