Hi Anoop,

The answer to your questions lies in your dreams and priorities in life. Delhi University is an excellent choice and both the courses are pretty decent.

A b.com programme is a plain b.com degree with no specialisation. It is beneficial if you want to go for commerce related fields like CA/CS etc. Placements would depend on the college and on your ability, usually companies do allow both Honours and Programme candidates for applying.

A B.Voc can be considered like a professional course with many exit options. It prepares you for the job market and would probably fetch you a job especially in the sales sector. Internships form a good part of the course and placements are generally decent. 

All the best!