PE middle office vs BB corp

Assuming that PE middle office means portfolio operations or fund accounting, then it all depends on what your career goals are. Corporate banking and working in middle office for a PE fund are two different careers. In corporate banking you'll be mostly working on credit-related deals, and on some occasions be working together with DCM. You would typically be providing revolvers, term loans, bridge loans, etc. for clients and you would not work on large M&A or IPO deals like IB does. The role is nice if you're looking for a better work-life balance, however, the consequence is that your career prospects are limited since its typically harder to exit to another finance role especially a buy-side one. PE mid-office is similar to corporate banking as the hours are better than front office, yet your main function is to support the investment teams. This may include having to compile data, weekly accounting for portfolio companies or funds, etc. at any given time for them. The downside is that you do not get any insight into how the investment process (aka sourcing a deal to execution) is done. Both roles offer very limited upside in terms of career exits for finance but can be beneficial for areas outside of it like corporate development or strategic finance. Out of the two, corporate banking would provide the most value or insight since you get to work with clients directly.