Is PSLV better than GSLV?

GSLV rockets can carry heavier payloads or satellites up to an altitude of 36,000 km. PSLV rockets carry smaller payloads at a smaller altitude. However, PSLV has a higher success rate than GSLV and is the workhorse of ISRO. You can read about the GSLV Mk III – A Comprehensive Overview of Heavy Lift Launch Vehicle in the given link.

Further readings:

1. Indian Space Research Organisation [ISRO Notes for UPSC]
2. Mars Orbiter Mission (MOM) – A Complete Overview of Mangalyaan Mission