The B.Sc (hons) degree is more beneficial than a B.Sc degree. A student with a B.Sc (hons) degree, is normally given preference over a student with a  B.Sc (general) degree.

Bsc Agriculture hons is more of a degree course and admissions can be based on merit or on entrance test whereas the management course is more of a professional course and there is an entrance for this course.

If you want to opt for one the scope and intensity is more in Bsc management course in agriculture. Though the difference is not major. Most of the curriculum will be same but the degree of bsc agri. management will be more useful in theory as well as  the practical part.

All the best!