Both the courses B.Sc in IT and B.Sc in comp.Sc have their own significance and in fact both have their demands in the computer related field and hence you need not have any confusion in the selection of either of the courses.
B.Sc comp. Sc deals with details of studies of the computer fundamentals including the mathematical - concepts such as Bullen Algebra, Abstract Algebra, Java, Net- working etc.
Where as B.Sc in IT has been designed to upgrade the skills of the aspirants in the Information Technology according to the need of computer Industries. Skills of computer - programming such as Java, C++ etc are learnt and practiced to be a future - programmer by going through this course.
So there is no superiority in choosing a particular course. The employer would be happy with your computer related concepts and skills. Learn the fundamentals honestly so that you can be an efficient Manager later on.
Yes, you can persue some diploma courses after B.Sc for the upgradation of your computer - skills and your demand in this line will multiply how sincerely you have grasped the different tools effectively. Your passion would definitely yield positive results in the computer - field.