Super day format?

I've done a couple of superdays. I think it would be helpful if you mentioned where exactly. For example, the superday format for Citi differs quite greatly from BAML in the sense that at Citi, you are given a case study to work on and grilled on that were as with BAML it's just plain technicals.

Been to 7+ superdays across different cities. Format is usually 1 technical interview, and the rest behavioral. Citi Houston has 1 technical and 1 case study and rest behavioral. Some EB Superdays had only 1 behavioral with a senior banker and the rest mix of technical and case study. But I’d say BB generally stick to the 1 technical and rest behavioral model (# of interviews on the Superday varies by bank)

one of the buyside superdays i had was 5-6 back-to-back 15-20 minute interviews, they were set up in different rooms and candidates rotate every 20 minutes or so. the rooms were technicals, fit (walk through your resume), brainteasers, current events, and something else that i don't remember, each room had 2-3 analysts/assoc except for fit (i think they were HR but not sure)

In my experience, they vary pretty heavily by bank, but expect a number of interviews with people ranging from associate (or sometimes even analyst) to MD. Associates or analysts will usually grill you on technicals, VP/MD will be much more chatty and fit based. Each bank will have a different number of each, but usually its 5-6 total with at least 1 technical and at least 2-3 more fit. Usually there is also a lunch with an analyst or something similar.

That being said, like other people have mentioned, some banks do things like a case study or paper test. Look into each bank specifically if possible.