Which is better, thermal in NIT Trichy or design in NIT Warangal as per placements and package?

Having known some people who graduated from NIT Trichy and NIT Warangal I can say that there is no demand for either of these two subjects in the industry.

Both the colleges are of similar reputation in the industry, hence choose the one that suits your location. This will ease your transportation. 

• The students of these institutes opt for CSE, learn programming languages from scratch, willing to be computer engineers in the future.
• They are offered salary packages ranging from 12-24 LPA, depending on their skills.
• Sometimes it rises up to 50 LPA.
• These companies not only check academic credentials but also their TopCoder and GitHub profiles.
• Some even opt to be managers, their jobs demand and value academic credentials.
• They receive salary packages ranging from 15-18 LPA.

The placements at both colleges are good. Make a calculative decision considering the field you are interested in.