Given the recent economic outlook, for sure an early career with big4 audit will be an advantage - the promising career progression and professional qualification attainment.

But getting back to comparing among the 2, it is so hard to make a judgement on which one "will win" in long term as (1) which role of corp bank you will be taking? (2) what do you expect on your career change say per how many year(s) will be get a new job? (3) what is your life goal in 5 / 10 / 20 years? (4) What kind of person are you in a workplace - say will you be used to a front-office client-facing and sales-quota-bearing role? All these affect more in your career progression than the role itself seems.