BB office at a small country? Any prestigious at all?

Hey guys,

I landed two M&A FT offers in the country I live (LatAm). One is at the largest local M&A boutique (lots of lower middle market deals) and the other is at a BB office (way less dealflow, but some deals tend to reach the billions)

I believe there are more opportunities to learn at the boutique, however, it is practically unknown to the world, whereas the BB has a strong name and prestige, but obviously deal flow is significantly smaller (this does not mean fewer hours tho, I've heard that they spend a lot of time on pitches)

As a recent graduate who wants to work at a global financial hub in the future (such as NYC, LDN), which option would you choose?

Thanks in advance