Internal Audit at Citi vs. Risk and Financial Advisory at Deloitte

Hey everyone!

I currently have an internship this summer with Citi in Internal Audit in Texas and next summer with Deloitte in Risk and Financial Advisory in NYC. If Citi gives me a full time offer after the internship, full time will begin next June. However, I do want to accept my offer from Deloitte for next summer (June through July). I'm not sure what to do. How long do firms give you to make a decision to accept a full time offer? Could I wait to see if Deloitte offers me a full time position or would it be too late?

I am looking for a Management Consulting role where I can travel domestically and internationally if the opportunity presents itself then go back to school to get my MBA. I am an undergraduate accounting student and do you think having a CPA helps in a consulting role? Higher pay, more credibility?

I know I have a lot of questions, please let me know if you have any constructive advice in terms of better compensation, more travel opportunities, better exit opportunities? Thank you!