One of my friends studied in the PSG Mechanical branch. In his opinion, both the colleges are well known and quite famous for Mechanical Engineering. Let me state some facts about them which might help you decide.

• NIT Trichy holds a certain advantage over PSG. 
• It is considered one of the top 5 NITs. It has earned recognition not only in India but also globally.
• In NIT Trichy you will get much more opportunities and the proper exposure. 
• PSG is not bad but while comparing it with NIT Trichy, it gets more leverage. 
• In PSJ the faculty members are really good in their respective fields. 
• In PSG students mostly like to learn their subjects by themselves and are independent of the teachers. 
• NIT Trichy has all the things required for such a core branch, like Good faculty members, excellent academics, internships, connection with industries, placement statistics, etc. 
• All this makes NIT Trichy a better option for Mechanical Engineering.

NIT Trichy develops your physical as well as holistic personality. It makes you confident with all the extracurricular activities it has to offer. Nit Trichy would be better overall and will definitely help you grow as an individual.