This question assumes that promotion in BBs is determined in the same way as that in local banks. While local banks promote mainly on the basis of seniority, in other words, the number of years spent on the job, BBs (and any truly competitive outfit for that matter) promote mainly on the basis of merit. This single difference explains why a local bank will never be as competitive or prestigious as a BB, and why compensation in a BB is significantly higher than in a local bank. BBs are ruthless and have no qualms about laying off staff that do not perform. As such, they are able to pay those who do perform handsomely. Local banks are way more egalitarian, and this egalitarianism extends to pay as well. As such, if you perform well, you will in all likelihood be subsidising that dud in your department. So if you think you've got what it takes, and pay is important to you, join a BB. If you're an unambitious average performer, join a local bank.