DSE doesn’t offer bachelor's in Economics. However, most other colleges under DU offer BA in Economics. 

BBE is a more professional course and focuses on the application in business scenarios. While BA Eco covers the theoretical aspects of Economics. If you want a career in academics or want to pursue research in the field, BA Eco will be the right choice. 

Among Maharaja Agrasen College (MAC) and Shivaji College, the former is known to be a strict and disciplined institution while the latter is much lenient.

• MAC has a better reputation as an educational institution.
• They have a better and well experienced faculty.
• Teachers in Shivaji are mostly careless and often miss classes. This hampers the studies and eventually they fail to complete the syllabus.
• MAC unlike Shivaji is very strict about its academics.
• They are even strict about maintaining an 80% attendance.

But, all in all ultimately everything depends on the student and their hard work and dedication towards the course. Because the colleges are more or less the same, it is how you prepare yourself for your career ahead.