Poornima University being a private institution has a very well structured and organized course. RIET on the other hand, is an engineering college affiliated with RTU and is not a university in itself. 

Here are some facts that makes PU a better choice:

• PU unlike RIET provides an updated academic curriculum which caters to the latest industrial trends. 
• The curriculum of RTU is becoming obsolete.
• PU focuses more on practical training enhancing the students skills.
• PU has a well experienced faculty, they are given proper training from industry leads during seminars and internships.
• The placements of PU are much better than RIET.
• The highest salary package of 37 LPA was offered by Google India to a PU student.
• TCS, IBM, Wipro and Infosys take students during mass recruitments.

Therefore, if you consider every point, PU is definitely better than RIET. It is suggested that you go for PU as it is the best in the city.