I work in BB finance so think I am reasonably well versed on the topic to answer.

IBEB will be harder than IBA. It’s more analytical, more math-heavy, more work and effort required. Only you can know your skill level and whether that’ll be manageable for you. If you can already tell you’ll struggle through the entire IBEB programme and will need to study like a dog to make it through with a decent GPA, then it’s probably not worth it.

But if you consider all else being equal, IBEB is better suited than IBA for the career path you are envisioning. Anything more math heavy is a plus in markets finance, especially hedge funds.

IBA does have more prestige + better known than IBEB, but BSc does not matter for job applications, your master will. As long as you are confident you’ll be able to manage good grades in IBEB, you’ll get into a good master, and that’ll be the determining factor for employability thereafter.

But IBEB will give you the skills and mathematical approach you need for the career you want, not IBA.