In looking through our database of over 240 former clients and speaking to Bain partners we know, we see two unique ways a Bain fit interview differs from a McKinsey PEI. The first relates to way in which you interact with the interviewer as you deliver your response, and the second relates to a very specific attribute that Bain seeks in your fit responses. Both differ substantially from a McKinsey or BCG interview. In fact, EVERY single client we placed at Bain strongly displayed these two characteristics. It is uncanny how close a correlation exists.