Hey Shwet,
When given a choice between venky and daulat ram, you should always go for venkateswara. Considering the faculty and it's reputation, venketaswara college is among the top colleges in du for bcom hons. Hence, the faculty is considered good over there when compared to daulat ram. Even the placements of venkateswara are always in name and have good image. Also the cutoffs goes high for bcom hons in venkateswara and always be in demand.
Hope this is clear.
Good luck!