Hello,
Prasanna school is better.There are certain factors you should consider such as fee,internship/job placements and packages offered.Prasanna ranks better and it also has brand name of manipal.
You can also refer the official website :
https://manipal.pure.elsevier.com/en/organisations/prasanna-school-of-public-health-manipal-university-manipal

Hope I helped you.All the best for future endeavour!!