It depends on the job. Personally, the distinction between BA and BSc for graduate jobs outside of academia is minute and insignificant.
Accounting is not really considered a numerate subject (it's GCSE Maths mostly). Finance isn't really that numerate unless it has a lot of financial mathematics - if it's paired with accounting it's usually not; if doesn't require you to have at least A Level Maths, it's definitely not.
BSc is more academic than a BA in most cases, so if you want to go into research in accounting or finance in postgrad, then the BSc would produce a stronger application. I haven't seen the distinction to be that great for graduate jobs in general since they would shortlist you by grades in general.
For more quantitative roles, employers generally look at graduates with generally quantitative degrees e.g.
•
Actuarial Science, Financial Maths, Financial Engineering, Finance (if require A Level Maths at least)
•
Economics and MORSE (maybe)
If you are using it to apply for accounting roles, A&F tend to be as good as a degree as any but you generally won't get any advantage in your application by doing the degree as opposed to a degree in another subject. Accounting isn't really a quantitative role (contrary to popular opinion), so you don't need a quantitative degree in order to do it and they generally accept people from any background.
If you want a more quantitative role, then you might want to look at roles in actuary, quantitative analysis, teaching maths at college/uni, theoretical physicist, engineering research (especially electrical/electronic), mathematical researcher.