Hey,
Both colleges are good enough but when compared for Bcom Hons one should go for Ramanujan over PGDAV. The reason be the faculty of Ramanujan be the biggest and great soo far. Also the faculty for bcom hons is much much better than PGDAV when compared. The placements says it all as Ramanujan has shown great placements records so far. Also Ramanujan has maximum number of professors for all the courses related to commerce. And you'll experience a great exposure as well as the college  has number of societies.
Hope this helps.
Good luck!

Hey,

both the colleges are really good as they come under Delhi University. If you have to choose between the two I would suggest you to go for pgdav. It is a really good college for commerce. The college societies are really good and tge faculty is well experienced. You should surely go for pgdav.