Hi 

Both universities are good. 

But in terms of comparison Sastra is little better than Amrita. Faculties are good and supportive. You'll get exposure and knowledge and chance to showcase your talent. 

Placement opportunities are also excellent . Reputed companies visit for placements. 

Whereas Amrita University has strict attendance rules. Teachers are knowledgeable but less supportive . But Amrita is equally good in terms of placements. 

All The Best!!