Have to choose between a sure offer and a more interesting unsure interview

Hi everyone,

So here is my situation/issue I thought you guys might be able to help me with.

I got an offer for a job as a KYC (capital markets) analyst but I also have a second interview for a coverage analyst position at the same bank. I have to give an answer by Wednesday for the KYC one, but I am more interested in the second job. I am however scared to put pressure on the team about giving an answer quickly after the interview. It will be the second interview, I am not sure if it will be the last but it will be with a senior banker.

But I am also scared to let the first opportunity go, as I kind of need a job and it's an opportunity to go to NY. But I want to work more in IB or PE as my career goes on and I am afraid a KYC position might penalized me. The other position is in FIG in coverage, and I think could be a good start to then go into a sales career for example. It's at the same bank so I can't really say yes to one and then go back on my word...

Any advice on what I should do ?

Thanks !