It depends on your field. There are universities for all kinds of fields out there, and it really depends on your grades, qualification and sometimes the subjects you pick within the field itself. What are your ambitions? Which subjects do you favor over others?
As far Business Studies being easier than Science, well yes, in short it is. The syllabus and questions are comparatively less complicated and no practicals are involved. But if you ask me I'd think it is the most miserable thing known to man because it doesn't make sense to me in the least. Hence, I'd pick science over humanities any day. So it comes down to your interest and proficiency.