Actuarial Science vs Accounting and Finance at uni

With these degrees, the only real comparison can be made when applying for jobs after the degree has finished. For example, if you do actuarial science, then you may obtain exemptions for certain iFoA exams and with an accounting degree you may obtain ACA or ACCA exemptions for example. Hence, it depends on which job you apply for. That said, there is some crossover and both degrees could probably get you started in both fields although perhaps not with exemptions. I would expect that actuarial science requires a higher standard of mathematics so maybe bear that in mind.
Hope this helps.

Which would you say has more job opportunities? Or like “open more doors”?

From the time I spent looking for graduate jobs (my degree is in maths btw) there were more accounting jobs than actuary jobs. They are still difficult to get anyway so the availability of jobs shouldn't hold too much sway in your decision. If you are looking to keep doors open, perhaps a course such as MORSE (Maths, Operational Research, Statistics and Economics) would be worth looking into.

Ohhh that’s a good idea! Thank you! What jobs can I do if I take MORSE? Can I still become an accountant or actuary?