Hello Nishant, please check out the following link for detailed info on the colleges you mentioned: 

https://www.careers360.com/colleges/motilal-nehru-college-new-delhi

https://www.careers360.com/colleges/dyal-singh-college-new-delhi

Both are excellent colleges under DU however, motilal nehru is NAAC B rated while dyal singh has a NAAC A rating. Dyal Singh was established way before than Motilal Nehru.

BCom Hons in Motilal Nehru has 154 seats and about 14000 INR coursefee while the BCom course has 185 seats.

BCom Hons in Dyal Singh has 185 seats with 41.12k coursefees and BCom with 40.52k INR coursefees

Dyal singh has a higher ranking amongsts DU colleges than Motilal Nehru

Both have similar faculty and infrastructure as per standard DU norms but dyal singh will be a better college in relative terms and would have a higher cutoff.