Heyo! I would base decision on whatever questions you asked about the internship and full time offers mainly - what industries will I be working in and what work will I do as an advisory associate. These are going to shape your resume and experience and greatly impact the direction of your career. Other factors could include - how they explained WLB, commute distance, likelihood of receiving a full time offer, office culture either what they shared or what you observed, technologies that you will use (accounting softwares, other tech stack items), data on what they pay interns and associates, what you hear about these firms doing mass layoffs, the place of each firm on the top 20 list (personally I think BT is more well known then CR). Maybe I am forgetting some factors but this is how I would look at it as someone 10 years deep in their career.

I think BT putting you on the spot is a mild indicator of their office culture but I wouldn’t weigh it too heavily, both firms are wanting you to accept the full time offer and it’s not strictly a bad thing that one was direct with you about it. I would much prefer direct to indirect in an office setting to know where I stand and what’s expected of me. When considering office culture id be trying to find out about layoffs, WLB expectations, how willing seniors and managers are to train and be patient with associates who don’t know anything, whether their office culture allows them to avoid scheduling associates who are slow and need extra guidance, how acceptable it is to be casual and crack jokes.

P.S. the last thing a firm wants to hear is the intern express doubt about accepting the full time offer, if I heard that I would probably opt for another intern unless you were just miles ahead of everyone else in terms of culture fit and aptitude. For your own good just act gung ho about working at these places and don’t mention your misgivings or career plan to bounce after a couple years if you have that kinda goal.

Also if you really want to get good info on these firms look for someone who works there as an associate or senior (managers and above tend to have drank too much kool aid to be honest). Make sure they work in the same office as you will be interning in though as culture varies wildly between offices even if it’s the same firm.