Questions and Tips at Superday (slightly different case)

I know that there are multiple threads asking the same question.. but.. my case is slightly different.

Basically, I have a superday/final round with Citi IB BJ.  They originally schedule me for NYC, but moved to London once I told them I was studying abroad.

I was wondering if they questions would be different in London or not.. and Are the questions specifically geared toward the location of the position or just general IB interview questions.

Lastly, what kind of questions have been thrown at you, and how do you prepare for these interviews?

Thanks a lot guys!