As per the analyzing report of Careers360 PDPU has AAA+ rating which means good & Nirma University has AAAA rating which means very good. The rating is based on the research of the colleges on placement, Faculty, Study Environment etc.  You can also check the genuine reviews of the college with the given below link.

https://engineering.careers360.com/colleges/nirma-university-ahmedabad

https://engineering.careers360.com/colleges/pandit-deendayal-petroleum-university-gandhinagar

Good Luck!