Round 2 often raises the bar on judgment, synthesis, and overall polish. The fundamentals still matter, but interviewers may pay closer attention to whether you can communicate like someone they would actually want to put in front of clients.
That can show up through tougher pushback, broader fit questions, or higher expectations around top-down communication and business sense. The exact style varies by interviewer, but the general standard often feels a bit more senior.
So prepare as if the basics are assumed and your job is now to show stronger consistency and maturity across the interview.