It depends on your goals and where you want to end up (and the specific bank where you received the IB PF offer). You could potentially use either one to move into more of a “real” IB group if that is your goal, but I think you’d probably have an advantage doing so coming from PF within a large bank – just because you’re already at the large bank (assuming you make the move quickly). The Big 4 offer might win if it were not in FDD but in the actual internal investment bank at the firm instead.