I would recommend you do neither. Don't contain yourself to one industry - it will hurt your employment prospects. You need a degree that is versatile and usable across many industries. Of course - it depends on what type of work you want to do, but anything with business or finance are key skills and qualifications that can be transferrable to any industry.
Plus at the end of the day, in my opinion, your tertiary skills mean nothing. Recruiters tend to care about the experience and skills-fit for the role - not whether you have an MBA, BBA, BCOM etc. I have three degrees. Undergraduate and two post-graduate. It has done nothing to accelerate or improve my career prospects. Just a lot of expense. Networking (relationships) and 'chance' are what enabled me to secure the different roles I have held.